content
string
quality_label
int64
meta
string
all-MiniLM-L6-v2_embedding
list
doc_id
int64
unique_id
string
Factoring Formulas This is certainly equal to the original formula but I would not consider it "factoring". I agree with MarkFL. Since the equation $x^2+ 49= 0$ has no real roots, $x^2+ 49$ pr $x^2= -49$ cannot be factored using real coefficients. But it can be factored as $(x- 7i)(x+ 7i)$ since, if $x^2= -49$, then $x...
4
[ 0.00408935546875, 0.04833984375, -0.00421142578125, 0.1484375, 0.05859375, 0.044189453125, 0.00732421875, 0.045166015625, -0.01434326171875, -0.01263427734375, 0.12890625, -0.00640869140625, 0.03369140625, 0.162109375, 0.043701171875, -0.07763671875, -0.0159912109375, 0.06494140625...
35,100
35100
Space of boundary modular symbols Used mainly for computing the cuspidal subspace of modular symbols. The space of boundary symbols of sign 0 is isomorphic as a Hecke module to the dual of the space of Eisenstein series, but this does not give a useful method of computing Eisenstein series, since there is no easy way ...
5
[ -0.06494140625, -0.034423828125, 0.0185546875, 0.0302734375, 0.026611328125, 0.039794921875, 0.011474609375, 0.003753662109375, 0.08740234375, -0.1728515625, 0.03515625, -0.01806640625, -0.01251220703125, 0.031005859375, -0.009765625, -0.0281982421875, -0.01416015625, 0.02124023437...
35,101
35101
Interesting sum of series March 20th 2009, 08:21 AM #1 Newbie Joined Mar 2009 Posts 2 Interesting sum of series Hi, I'm an engineer and recently, within my work on non uniform signal sampling, I encountered the following series : $S(t)=\sum _{n=1}^{+\infty }{\frac{1}{\sigma \sqrt{2\pi n}}}\cdot...
5
[ -0.09619140625, -0.056884765625, 0.040771484375, 0.036865234375, 0.0218505859375, -0.020751953125, -0.004730224609375, 0.0537109375, 0.03173828125, 0.00970458984375, 0.004852294921875, 0.05908203125, 0.034912109375, -0.02734375, -0.04296875, -0.111328125, 0.12158203125, -0.08496093...
35,102
35102
Inequalities Question If $a,b,c$ are positive real numbers prove that $\Bigl[ (1+a)(1+b)(1+c) \Bigr]^{7}>7^{7} a^{4}b^{4}c^{4}$ Use AM $\geq$ GM . $a^7 + b^7 + c^7 + (ab)^7 + (ac)^7 + (bc)^7 + (abc)^7 \geq 7 (abc)^4$ Replace a,b,c by $a^{\frac{1}{7}}, b^{\frac{1}{7}}, c^{\frac{1}{7}}$ it becomes : $a + b + c + ab + ac...
5
[ 0.0037994384765625, 0.06396484375, 0.00982666015625, 0.06689453125, -0.1494140625, 0.038330078125, -0.005828857421875, -0.03515625, -0.01373291015625, 0.06494140625, -0.154296875, -0.03271484375, 0.0301513671875, 0.07177734375, -0.053955078125, 0.057373046875, -0.00299072265625, 0....
35,103
35103
Mathematical Induction problem April 6th 2011, 07:31 AM #1 Member Joined Sep 2009 Posts 149 Mathematical Induction problem problem #14 on here: This is what ive done so far: 1.) prove that the 2 equations are equal by testing P(n) at 0. They are, so i proceed to the inductive step and rewrite ...
5
[ -0.08349609375, 0.08544921875, 0.07861328125, 0.09033203125, 0.09423828125, -0.025390625, 0.060791015625, 0.006866455078125, -0.0064697265625, 0.01708984375, -0.06005859375, -0.08837890625, 0.04345703125, 0.0390625, -0.01263427734375, 0.004180908203125, -0.04638671875, -0.014587402...
35,104
35104
Graphing square root functions April 28th 2013, 04:51 PM Unreal Graphing square root functions Hi! I can tell the domain from the graph of these functions but how do I tell the range from their graphs? $h(x) = -\sqrt{x + 2}$ and $f(x) = \sqrt{2 - x} - 1$ I can find the domain easily: $h(x) = x + 2 ...
4
[ 0.0047607421875, -0.05615234375, 0.004302978515625, -0.0284423828125, -0.0032196044921875, -0.06689453125, -0.107421875, 0.06591796875, 0.001800537109375, 0.00506591796875, 0.0390625, 0.01055908203125, -0.0015869140625, 0.020751953125, 0.0308837890625, -0.01416015625, -0.009338378906...
35,105
35105
Math Help April 13th 2008, 07:59 PM #1 Member Joined Sep 2006 Posts 221 Sets Given $A$ is a set with 6 elements, a.) Determine the number of relations on $A$ there are b.) Determine the number of symmetric relations on $A$ there are c.) Determine the number of reflexive relations on $A$ t...
4
[ 0.0167236328125, -0.042236328125, 0.0164794921875, -0.07275390625, -0.1103515625, 0.06201171875, -0.0108642578125, -0.008056640625, 0.000522613525390625, 0.04345703125, -0.026611328125, -0.0059814453125, 0.05322265625, -0.0185546875, 0.01239013671875, 0.0849609375, -0.0223388671875, ...
35,106
35106
Polar coordinates January 27th 2008, 01:49 AM #1 Member Joined Sep 2007 Posts 198 Polar coordinates The polar equation of a curve C is r^2 = 2 sin 2Ѳ. (a) Find a Cartesian equation for C. (b) Show that C could be represented parametrically by the equations x =(2t)/(1 + t^4), y = (2t^3)/(1+t^...
5
[ -0.00286865234375, 0.051513671875, -0.038330078125, 0.00860595703125, 0.004150390625, -0.016845703125, -0.0086669921875, 0.09130859375, -0.01409912109375, -0.01544189453125, 0.06201171875, -0.06298828125, -0.046875, 0.10400390625, -0.0201416015625, 0.07470703125, -0.03466796875, -0...
35,107
35107
Proposition 36 If two rational straight lines commensurable in square only are added together, then the whole is irrational; let it be called binomial. Let two rational straight lines AB and BC commensurable in square only be added together. I say that the whole AC is irrational. Since AB is incommensurable in leng...
5
[ 0.005096435546875, 0.0157470703125, -0.0096435546875, 0.01611328125, -0.11376953125, 0.1044921875, 0.027099609375, -0.048828125, 0.00628662109375, -0.054931640625, -0.04638671875, -0.04052734375, 0.059814453125, 0.03076171875, -0.03125, 0.01312255859375, -0.04931640625, 0.009643554...
35,108
35108
Brazilian Journal of Physics Services on Demand Article Indicators Related links Share Print version ISSN 0103-9733 Braz. J. Phys. vol.31 no.4 São Paulo Dec. 2001 http://dx.doi.org/10.1590/S0103-97332001000400008  Thermodynamics of the limiting cases...
4
[ -0.056396484375, -0.03955078125, 0.02587890625, 0.1484375, 0.05810546875, 0.024169921875, -0.04833984375, 0.05859375, 0.083984375, 0.0262451171875, -0.0240478515625, -0.00042724609375, 0.0302734375, 0.002197265625, -0.019287109375, -0.049072265625, 0.00115203857421875, -0.129882812...
35,109
35109
Brazilian Journal of Physics Services on Demand Article Indicators Related links Share Print version ISSN 0103-9733 Braz. J. Phys. vol.37 no.1a São Paulo Mar. 2007 http://dx.doi.org/10.1590/S0103-97332007000100010  Cold and dense perturbative Yukawa theory with massive fermions L. F. Palhares; E. S. Fraga Ins...
4
[ -0.13671875, -0.0986328125, 0.0028228759765625, 0.1103515625, -0.008056640625, 0.0595703125, 0.043701171875, 0.0693359375, 0.0732421875, -0.053466796875, -0.0040283203125, -0.006195068359375, -0.044189453125, 0.0303955078125, 0.047119140625, -0.07080078125, 0.0037841796875, 0.03417...
35,110
35110
Function of an area problem September 20th 2009, 12:31 PM #1 Newbie Joined Sep 2009 Posts 11 Function of an area problem Given 1200 meters of fencing, a farmer needs to enclose three sides of a field (with the other side being a river). Write a function finding the area (A) in terms of the width (x)...
4
[ 0.03662109375, 0.07080078125, -0.0159912109375, -0.099609375, -0.045166015625, -0.020263671875, -0.0167236328125, 0.06982421875, -0.08935546875, 0.041748046875, 0.04345703125, 0.002410888671875, 0.050537109375, 0.080078125, -0.0002994537353515625, 0.15234375, -0.0419921875, -0.0057...
35,111
35111
Lever Rule For Computation Of Live Load Distribution Factors In CONSPAN [TN] Comments: 1 Document Information Document Type: TechNote Product(s): LEAP CONSPAN Version(s): All Original Author: Bentley Technical Support Group EXAMPLE 1: COMPUTATION OF LEVER RULE FOR EXTERIOR BEAM The distribution f...
4
[ -0.03564453125, 0.037841796875, -0.001739501953125, -0.041748046875, 0.0064697265625, -0.0615234375, 0.06494140625, 0.05517578125, -0.0233154296875, 0.0289306640625, 0.041748046875, -0.013671875, 0.060546875, 0.00640869140625, 0.013671875, 0.08642578125, 0.0206298828125, -0.0033264...
35,112
35112
Even Number Proof Prove all even perfect numbers will end in 6 or 8. Since it is even we can write, by Euler, n=2^{k-1}*(2^k-1) ---> Note k must be a prime. Trivial for k=2. Assume k>2. Divide the proof into two cases. Case I If k=4j+1 then just by working modulo 10 you find that n = 6 (mod 10). Case II If k=4j+3 then...
4
[ 0.0118408203125, 0.06201171875, 0.05419921875, 0.07568359375, 0.09375, 0.033203125, -0.0020599365234375, 0.1455078125, -0.052001953125, 0.0208740234375, -0.034912109375, 0.029541015625, 0.0150146484375, -0.0235595703125, -0.039306640625, -0.007293701171875, -0.061767578125, 0.04394...
35,113
35113
IMU-Based Online Kinematic Calibration of Robot Manipulator The Scientific World Journal Volume 2013 (2013), Article ID 139738, 10 pages http://dx.doi.org/10.1155/2013/139738 Research Article IMU-Based Online Kinematic Calibration of Robot Manipulator School of Computer Science & Engineering, South China University ...
4
[ -0.033203125, 0.049560546875, -0.07568359375, -0.080078125, 0.0101318359375, -0.015869140625, 0.0059814453125, 0.039306640625, 0.000720977783203125, 0.04052734375, 0.17578125, -0.01153564453125, 0.076171875, 0.01007080078125, -0.1044921875, -0.034912109375, -0.00860595703125, 0.052...
35,114
35114
painted cubes 07-30-2009 10:45 AM #2 Posts 3 Thanks 0 Thanked 0 Times in 0 Posts 07-30-2009 09:45 AM #1 Posts 7 Thanks 0 Thanked 0 Times in 0 Posts painted cubes How many different ways can 3 cubes be painted if each cube is painted one color and only the 3 colors red, blue, and gree...
4
[ -0.004180908203125, 0.005279541015625, -0.0194091796875, -0.030029296875, -0.0191650390625, 0.06689453125, 0.059326171875, -0.056396484375, 0.003997802734375, -0.05712890625, -0.11474609375, -0.03466796875, 0.0625, 0.044189453125, 0.0205078125, 0.0859375, -0.0206298828125, -0.01586...
35,115
35115
Lessons In Electric Circuits -- Volume II Lessons In Electric Circuits -- Volume II Chapter 8 FILTERS It is sometimes desirable to have circuits capable of selectively filtering one frequency or range of frequencies out of a mix of different frequencies in a circuit. A circuit designed to perform this frequency...
5
[ 0.031494140625, 0.022216796875, 0.02685546875, -0.06396484375, -0.064453125, -0.0263671875, 0.022705078125, -0.0296630859375, 0.056396484375, -0.032958984375, -0.0830078125, -0.059326171875, 0.01531982421875, -0.053955078125, 0.0142822265625, 0.03076171875, 0.06494140625, 0.1113281...
35,116
35116
triangle proof March 9th 2009, 10:22 PM #1 Newbie Joined Mar 2009 Posts 9 triangle proof you have an isosceles triangle whose angle is x and the two equal sides are s. show that the area of the triangle is given by A=1/2 s^2 sinx. I got 1/2 s sinx but i cant get s^2 can someone help? i greatly appre...
4
[ -0.020263671875, 0.04931640625, 0.034912109375, 0.0264892578125, -0.017822265625, 0.06298828125, -0.02978515625, 0.019287109375, -0.004791259765625, 0.046875, 0.052001953125, -0.0859375, 0.0390625, 0.041259765625, 0.07177734375, -0.0303955078125, 0.03759765625, -0.006011962890625, ...
35,117
35117
tetrahedron die probability January 17th 2010, 01:45 AM #1 Senior Member Joined Jan 2009 Posts 381 tetrahedron die probability A fair tetrahedron die has four faces , each with digit 1,2,3,4 . THe die is tossed three times. The sum of three visible surfaces is recorded as T at each toss . The events A , ...
5
[ 0.00439453125, -0.007659912109375, -0.05517578125, -0.125, -0.0250244140625, 0.08544921875, 0.05517578125, -0.006683349609375, 0.05712890625, 0.09765625, -0.0157470703125, -0.1142578125, -0.01318359375, 0.005889892578125, -0.00909423828125, -0.02294921875, -0.06396484375, -0.044921...
35,118
35118
questions in physics help December 11th 2010, 09:10 AM #1 Senior Member Joined Oct 2009 Posts 290 questions in physics help 1 What is the relation between the main current which flows from the source and the current in each resistor in series ? The current is same for each resistor in series 2...
4
[ -0.0264892578125, 0.06884765625, -0.08154296875, -0.0703125, 0.01031494140625, 0.035400390625, -0.07763671875, 0.049560546875, 0.0086669921875, 0.04248046875, 0.007568359375, -0.05126953125, 0.037353515625, 0.041748046875, 0.01220703125, 0.015869140625, -0.11572265625, 0.0095214843...
35,119
35119
Qestion in set theory December 17th 2008, 02:26 AM John G Qestion in set theory L is the set of cofinite subsets of N (i'm not sure if i understand the concept of cofinite sets). I need to prove that L is countable. How do i prove this? What to do? Thanks for any kind of help :-) December 17th 2008, 12...
5
[ 0.035400390625, 0.0091552734375, 0.006439208984375, -0.0400390625, 0.0517578125, 0.11962890625, 0.09228515625, 0.07177734375, -0.0291748046875, -0.0191650390625, -0.07861328125, 0.0020904541015625, 0.02099609375, -0.041015625, -0.0654296875, -0.00927734375, 0.0159912109375, -0.1079...
35,120
35120
Periodic Function October 29th 2006, 01:21 AM needmathshelp Periodic Function Hey can anyone help me with this Q Mr Johnston is a very keen fisherman who will go fishing at any time of the day or night. He requires 1.5 metres of water at the boat ramp (ie. 1.5 m above the mean sea level) to launch his boat ...
5
[ -0.09130859375, 0.05859375, 0.1015625, -0.0113525390625, -0.0235595703125, -0.035400390625, -0.010498046875, 0.0732421875, -0.0712890625, 0.017578125, 0.0018768310546875, -0.09033203125, 0.03173828125, 0.03076171875, 0.10400390625, 0.05078125, -0.06298828125, -0.05224609375, 0.00...
35,121
35121
Homework Help Posted by Ravinder on Monday, November 12, 2012 at 11:31pm. Suppose we pump water into an inverted right-circular cone tank at the rate of 6 cubic feet per minute. The tank has the height 9 ft and radius on the top is 8 ft. What is the rate at which the water level is rising when the water is 3 ft deep? ...
5
[ -0.03271484375, 0.04833984375, -0.0096435546875, -0.00153350830078125, 0.0302734375, -0.06591796875, -0.076171875, 0.1064453125, 0.01019287109375, -0.056640625, -0.04248046875, -0.007232666015625, 0.0546875, 0.06494140625, -0.00506591796875, 0.0361328125, -0.07861328125, 0.04467773...
35,122
35122
th Below are the first 10 and last 10 pages of uncorrected machine-read text (when available) of this chapter, followed by the top 30 algorithmically extracted key phrases from the chapter as a whole. Intended to provide our own search engines and external engines with highly rich, chapter-representative searchable te...
4
[ -0.03466796875, 0.0274658203125, -0.002105712890625, 0.0390625, 0.0556640625, -0.103515625, -0.0296630859375, 0.051025390625, 0.033447265625, 0.01287841796875, 0.0260009765625, 0.01080322265625, 0.10791015625, -0.07177734375, 0.00188446044921875, -0.03173828125, -0.0213623046875, 0...
35,123
35123
Revista de Saúde Pública Services on Demand Article Indicators Related links Share Print version ISSN 0034-8910 Rev. Saúde Pública vol.37 no.4 São Paulo Aug. 2003 http://dx.doi.org/10.1590/S0034-89102003000400013  ...
4
[ 0.006103515625, -0.03369140625, -0.0027313232421875, -0.00384521484375, 0.08837890625, 0.111328125, 0.0179443359375, 0.0155029296875, -0.00921630859375, 0.05126953125, 0.0361328125, -0.0791015625, 0.0157470703125, 0.0380859375, -0.043212890625, -0.00066375732421875, -0.056884765625, ...
35,124
35124
Answer check (Vector space) April 4th 2009, 01:11 AM #1 Senior Member Joined Jul 2006 Posts 364 Answer check (Vector space) Hi, can someone just check my answer, please? Question: Two subspaces S and T of $P_2(\mathbb{R})$ are given by $S = \lbrace f(x) ~| ~3f(0)+f'(0) = 0 \rbrace$ $T =...
4
[ -0.05322265625, -0.0272216796875, 0.0196533203125, 0.02587890625, 0.0234375, 0.083984375, 0.12255859375, 0.002410888671875, 0.00872802734375, -0.007354736328125, 0.048583984375, -0.054931640625, 0.0306396484375, -0.0849609375, -0.0849609375, -0.0498046875, -0.021728515625, -0.06079...
35,125
35125
finding the vaule of a raised power May 20th 2012, 09:26 AM davellew69 finding the vaule of a raised power I have the following 12.0*1.08^x =25.0 I need to find the value of x but Im lost on how its done. Dave May 20th 2012, 09:45 AM earboth Re: finding the vaule of a raised power Quote: ...
4
[ 0.06201171875, 0.037353515625, 0.0113525390625, -0.04296875, -0.047607421875, -0.1572265625, 0.048828125, 0.064453125, 0.0888671875, 0.07861328125, 0.037841796875, -0.0302734375, 0.0244140625, 0.03857421875, 0.09228515625, 0.091796875, -0.1025390625, 0.050048828125, -0.0922851562...
35,126
35126
Equation - Changing the subject May 14th 2011, 08:51 PM GamerMath Equation - Changing the subject Hi, I'm working through a game graphics book (and I've been learning the math from scratch) and every now and again the author shoves in a bunch of equations and simplifies them, or changes their subject wi...
4
[ -0.0498046875, 0.03076171875, 0.0927734375, 0.0146484375, -0.03125, -0.07373046875, 0.00775146484375, -0.00726318359375, 0.029541015625, 0.06201171875, 0.0712890625, -0.029052734375, 0.0162353515625, 0.05322265625, -0.025634765625, 0.0439453125, -0.05078125, 0.00628662109375, -0....
35,127
35127
C Program to find multiplication of complex numbers Multiply complex numbers: Given two complex numbers 2 + 3i , & 3 + i The result of multiplication is (2 + 3i) (3 + i )= 6 + 2i + 9i + 3i2 since i2 = -1 => 6 + 11i - 3 =3 + 11i Write a C program to multiply two complex numbers Write a C program to find mult...
4
[ -0.06982421875, 0.021484375, -0.12890625, -0.091796875, -0.08935546875, -0.1298828125, 0.0040283203125, 0.0625, -0.037353515625, -0.030517578125, 0.043701171875, -0.038330078125, 0.030029296875, 0.00787353515625, -0.0216064453125, -0.032958984375, -0.1484375, 0.11669921875, -0.05...
35,128
35128
For any quadrilateral the lines containing the diagonals always intersect October 9th 2010, 12:28 PM #1 For any quadrilateral the lines containing the diagonals always intersect Please let me know if the following proof is solid or if it contains errors. Thanks. Show that for any quadrilateral (convex or not...
4
[ -0.04052734375, 0.05224609375, 0.034912109375, -0.04931640625, -0.044189453125, 0.055419921875, 0.03369140625, -0.060791015625, 0.041748046875, 0.0186767578125, 0.0208740234375, -0.0184326171875, 0.07666015625, -0.0155029296875, -0.0908203125, 0.0269775390625, -0.036376953125, -0.0...
35,129
35129
Calculus..Need Help Soon Posted by Leanna on Sunday, September 12, 2010 at 10:09pm. If f(x)=1-x^3 and f^-1 is the inverse of f, how many solutions does the equation f(x)=f^-1(x) have? a)none b)one c)three d)five e)six • Calculus..Need Help Soon - MathMate, Sunday, September 12, 2010 at 11:30pm Work out the in...
5
[ -0.043212890625, -0.041015625, -0.00738525390625, 0.064453125, -0.041748046875, -0.046142578125, 0.0277099609375, 0.0264892578125, -0.01409912109375, 0.0224609375, -0.056884765625, -0.080078125, 0.028564453125, -0.001556396484375, -0.002716064453125, 0.0072021484375, -0.06787109375, ...
35,130
35130
Inventory Management Review Recent Comments In previous articles I've referenced the Economic Order Quantity (EOQ). This article is going to be the first of a few articles detailing various aspects of EOQ. This first post will discuss the basics and go step-by-step through an example of how to use EOQ when trying to d...
5
[ -0.099609375, 0.0101318359375, 0.0223388671875, 0.009765625, -0.08154296875, 0.052734375, 0.0224609375, 0.0546875, 0.035400390625, 0.09912109375, 0.02197265625, 0.0286865234375, 0.023193359375, 0.0220947265625, 0.0017852783203125, -0.010498046875, 0.06298828125, -0.042724609375, ...
35,131
35131
Am I more likely to roll at least one six if I have more dice? May 28th 2011, 05:31 PM #1 Newbie Joined May 2011 Posts 3 Am I more likely to roll at least one six if I have more dice? Hi, I've had a debate with some friends, about whether I'm more likely to roll at least a single 6 when I have 1000 ...
4
[ -0.0014801025390625, -0.1044921875, -0.06494140625, -0.05712890625, -0.016357421875, -0.024658203125, 0.0250244140625, 0.049560546875, 0.083984375, 0.022216796875, -0.035400390625, -0.00014495849609375, 0.034912109375, -0.05712890625, 0.023193359375, 0.040283203125, -0.08154296875, ...
35,132
35132
Trigonometric Identity Problem How do you show that: 2sinxcosx= (4tan{x/2})/(1+tan2{x/2}) . (1-tan2{x/2})/(1+tan2{x/2}) Thanks a lot for helping!! $1+\tan^2(\frac x 2) = \sec^2(\frac x 2)$ $1-\tan^2(\frac x 2) = \dfrac{2 \tan(\frac x 2)}{\tan(x)}$ $\sin(2x)=2\sin(x)\cos(x)$ ------------------------- $\dfrac{4 \tan(\fr...
5
[ 0.007781982421875, 0.005035400390625, 0.0703125, 0.09619140625, 0.0308837890625, -0.01177978515625, 0.000629425048828125, 0.050048828125, 0.024169921875, 0.008544921875, 0.0257568359375, -0.103515625, -0.050048828125, 0.0361328125, -0.00848388671875, 0.0205078125, 0.08251953125, 0....
35,133
35133
Gravitational Law May 5th 2009, 04:49 AM #1 Junior Member Joined Nov 2008 Posts 68 An object is fired vertically upwards from the surface of a planetary body; it moves under the action of Newton’s Gravitational Law, without resistance, so the equation is z'' = -gR^2 / (z + R)^2 . Find the relation bet...
5
[ -0.03271484375, 0.0576171875, 0.036865234375, -0.00109100341796875, 0.07373046875, 0.0002498626708984375, -0.037841796875, 0.05859375, -0.032958984375, 0.04150390625, -0.006683349609375, 0.00445556640625, 0.053955078125, -0.005126953125, -0.0078125, -0.020263671875, 0.0478515625, 0...
35,134
35134
Linear and Circular Parametric Equations Date: 05/05/98 at 01:06:28 From: Adrian Preston Subject: To calculate a parametric line segment from 2 arbitrary points. I'm an amateur computer programmer who is home schooling. I'm trying to figure out how I can write a computer program to plot a line segment between (x1,y1...
4
[ -0.057861328125, -0.032958984375, -0.07470703125, -0.061767578125, 0.0103759765625, -0.09619140625, -0.00982666015625, 0.037353515625, 0.01446533203125, -0.06689453125, 0.0166015625, 0.018798828125, 0.023193359375, 0.05078125, 0.042724609375, 0.056884765625, -0.08642578125, -0.0786...
35,135
35135
Subrings of Algebraic Extentions March 14th 2012, 08:57 AM leshields Subrings of Algebraic Extentions Let $L:K$ be an algebraic extension. Suppose that $R$ is a subring of $L$that contains $K$. Show that $R$ is a field. Give an example to show that the algebraic restriction is necessary. Take an $r\in R, r ...
5
[ 0.036376953125, 0.0556640625, -0.023681640625, 0.0157470703125, 0.041259765625, 0.022216796875, 0.07861328125, 0.029296875, 0.0218505859375, -0.06884765625, -0.049560546875, 0.02880859375, 0.017333984375, 0.049560546875, -0.048583984375, 0.07666015625, -0.0286865234375, 0.013977050...
35,136
35136
Number of metric spaces on N points up vote 13 down vote favorite 8 Given $X = \{x_1, ..., x_n\}$, how many collections $C$ of subsets of $X$ are there such that $C$ is the listing of all open balls of some metric space? The first nontrivial example is $n=3$; let's call the points $x, y$ and $z$. Also, let $a = d(x, ...
5
[ 0.00628662109375, 0.01031494140625, -0.0140380859375, -0.031982421875, -0.01123046875, 0.06689453125, 0.09423828125, 0.03857421875, 0.0693359375, -0.0126953125, -0.003662109375, -0.0986328125, 0.018310546875, 0.01324462890625, 0.03857421875, -0.03271484375, 0.03369140625, -0.104492...
35,137
35137
how to handle fraction + integral? March 6th 2013, 08:31 AM #1 Member Joined Sep 2011 Posts 75 how to handle fraction + integral? The equation from my book: (25.4) integral u^n du = u^(n+1) / (n + 1) + c says in the book its a confusing equation to boot. Can I get an explanation on this quiz qu...
5
[ -0.0211181640625, 0.016845703125, 0.04638671875, 0.07275390625, 0.0045166015625, -0.03759765625, -0.046875, -0.0130615234375, 0.040771484375, -0.051025390625, -0.00994873046875, -0.0008697509765625, -0.02880859375, 0.04150390625, -0.11474609375, -0.0400390625, -0.01373291015625, 0....
35,138
35138
Math Forum Discussions achille Posts: 575 Registered: 2/10/09 Re: Probability Pill Posted: Dec 31, 2012 7:16 AM On Thursday, December 27, 2012 5:39:14 PM UTC+8, William Elliot wrote: > Each day I take 1/2 an aspirin tablet. I bought a bottle of 100 tablets; > > each day I take out one, if it's whole I break it half a...
5
[ -0.034423828125, -0.01055908203125, -0.010009765625, -0.0281982421875, -0.0107421875, -0.0380859375, 0.0634765625, 0.0634765625, 0.029296875, -0.001678466796875, 0.014892578125, 0.0185546875, -0.016845703125, -0.0123291015625, -0.007781982421875, -0.03369140625, 0.0047607421875, -0...
35,139
35139
Cube roots Date: 05/30/97 at 09:34:01 From: Elena Subject: Cube roots Dear Dr. Math, How can I can figure out the cube root of a number? (i.e., that the cube root of 216 is 6). Thank you for helping me! Elena Date: 05/31/97 at 08:30:28 From: Doctor Jerry Subject: Re: Cube roots Hi Elena, There isn't a "test"...
4
[ -0.0106201171875, 0.00188446044921875, -0.095703125, -0.00445556640625, -0.0634765625, -0.055908203125, -0.05078125, 0.016845703125, 0.0296630859375, 0.000579833984375, -0.08251953125, 0.0113525390625, 0.0390625, 0.00555419921875, 0.0201416015625, -0.0302734375, -0.038818359375, 0....
35,140
35140
Complexity of Algorithm June 21st 2008, 08:04 AM sjenkins Complexity of Algorithm Can someone please help me with a formula I can use to calculate the complexity of an algorithm? For example, How large a problem can be solved in 1 second using an algorithm that requires f(n) bit operations, where each bit o...
5
[ 0.035400390625, 0.017333984375, -0.09033203125, -0.031005859375, -0.032470703125, -0.004486083984375, -0.01092529296875, 0.046142578125, -0.046142578125, -0.005218505859375, -0.0634765625, -0.02783203125, -0.033447265625, 0.02490234375, 0.010009765625, 0.01806640625, -0.05322265625, ...
35,141
35141
Double Root of a Polynomial May 23rd 2010, 04:43 AM Lukybear Double Root of a Polynomial If x^3 + 3px^2 + 3qx + r = 0 has a double root, show that the double root must be (pq-r)/(2q-2p^2) May 23rd 2010, 05:02 AM Dinkydoe It's not hard to see that it's a root of $f(x)=0$ in the first place. Now you're...
5
[ -0.040283203125, -0.010009765625, -0.0283203125, 0.0235595703125, -0.01116943359375, 0.060791015625, -0.052490234375, 0.0147705078125, 0.0250244140625, -0.0146484375, 0.056396484375, -0.018310546875, -0.00372314453125, 0.000675201416015625, 0.035400390625, 0.01312255859375, -0.075683...
35,142
35142
Math Forum Discussions Math Forum Ask Dr. Math Discussions Internet Newsletter MathTools Teacher2Teacher Teacher Exchange Workshops Search All of the Math Forum: Views expressed in these public forums are not endorsed by Drexel University or The Math Forum. Topic: What is pi_0? Replies: 2 Last Post: Jan 20, 2013 3...
4
[ -0.0888671875, 0.0167236328125, -0.03564453125, 0.043212890625, -0.08349609375, 0.1064453125, 0.06103515625, -0.022216796875, 0.07763671875, -0.028076171875, 0.06396484375, 0.0791015625, -0.007568359375, -0.07470703125, -0.058837890625, -0.023681640625, -0.03564453125, -0.067871093...
35,143
35143
Is is preferable to use a difference formula of higher order of accuracy for spatial derivatives to solve this IVP problem ? up vote 2 down vote favorite I want to numerically integrate the equation $\partial_t u= a(t) \partial_xu+b\partial_{xxx}u+c$ to get $u(t)$. Is is preferable to use a difference formula of highe...
5
[ -0.0859375, 0.03369140625, 0.0693359375, -0.06005859375, -0.031494140625, -0.060546875, -0.07958984375, -0.027587890625, -0.037353515625, -0.01708984375, -0.035400390625, 0.014892578125, -0.00799560546875, -0.0211181640625, 0.00726318359375, -0.029296875, -0.028076171875, 0.0219726...
35,144
35144
discrete math.proof.set theory. Theorem: A\(BUC)=(A\B)intersection(A\C) How to proof ?Any ideas would be useful. Thanks, Sasha A\(BUC) = (A\B) ∩ (A\C) PROOF: x are A\(BUC) => (x aren’t (A)) and (x are (BUC)) => (x aren’t (AUA)) and (x are (BUC)) => (x aren’t (A)) or (x are (B∩C)) => ((x aren’t A) or (x are B)) and ((x...
4
[ -0.0004291534423828125, -0.01190185546875, 0.0277099609375, -0.031982421875, -0.03173828125, 0.015869140625, 0.055419921875, -0.034912109375, 0.035400390625, 0.032470703125, -0.0216064453125, -0.1044921875, 0.03515625, 0.0205078125, 0.005859375, 0.10595703125, -0.000469207763671875, ...
35,145
35145
marginal variance of discrete joint distribution August 14th 2013, 12:30 AM #1 Senior Member Joined Oct 2009 Posts 295 Thanks 9 marginal variance of discrete joint distribution $\\\text{Given }Pr(X=i,\text{ }Y=j)=\frac{i+j-1}{8}\text{ for }i=1,\text{ }2\text{ and }j=1,\text{ }2.\\\\\text{Find }Var[Y]...
5
[ -0.01171875, -0.06005859375, 0.06689453125, 0.0067138671875, 0.04150390625, 0.0322265625, 0.05078125, 0.037841796875, 0.0439453125, 0.00122833251953125, -0.0306396484375, 0.09814453125, -0.01446533203125, 0.03466796875, -0.00567626953125, 0.04638671875, 0.0036773681640625, -0.00411...
35,146
35146
Expected distance between two random vectors in n-dimensional space February 14th 2013, 02:35 AM Mathsdog Expected distance between two random vectors in n-dimensional space Hi, Any help with this appreciated. If I have two column vectors $\mathbf{a}$ and $\mathbf{b}$, where the $n$ elements of each are dra...
5
[ -0.0021820068359375, -0.1318359375, 0.0115966796875, -0.11083984375, -0.02001953125, 0.0191650390625, 0.00482177734375, 0.024169921875, 0.06982421875, 0.041259765625, 0.06689453125, 0.054931640625, 0.0201416015625, -0.0458984375, -0.06787109375, 0.01177978515625, 0.048828125, -0.06...
35,147
35147
Finding the expected value of r^X October 12th 2011, 09:30 PM #1 Newbie Joined Mar 2009 Posts 1 Finding the expected value of r^X Hello, I have recently enrolled in a 3rd year Introductory Probability course. I'm having a pretty tough time with the course so I came to this forum again to seek some gu...
5
[ 0.038330078125, -0.04052734375, 0.01104736328125, 0.00396728515625, 0.04052734375, -0.032958984375, 0.0791015625, -0.01220703125, 0.03857421875, 0.0966796875, -0.0712890625, 0.06591796875, 0.04052734375, 0.06103515625, 0.033203125, 0.01953125, -0.0712890625, -0.05126953125, 0.001...
35,148
35148
define radi of convergence and give example 1) Let $\{ a_n\}$ be be complex sequence. Say $wot = 0$ is such that $\{ |a_nw^n| : n\geq 0\}$ is bounded. Let $A$ be an upper bound, so, $|a_nw^n| < A$ for all $n\geq 0$. Let $|z| < |w|$. Note, $| a_nz^n| \leq |a_nw^n| \cdot |\tfrac{z}{w} |^n < A \left| \tfrac{z}{w} \right|^...
4
[ -0.050048828125, -0.0693359375, -0.10107421875, 0.1298828125, 0.024658203125, -0.036865234375, -0.035888671875, 0.0101318359375, 0.044189453125, -0.049072265625, 0.035888671875, 0.004669189453125, 0.04931640625, 0.017333984375, -0.04931640625, -0.01434326171875, 0.0223388671875, -0...
35,149
35149
One logarithm question November 15th 2008, 06:00 AM BG5965 One logarithm question*EDITED Hi, I am having problem with one difficult looking logarithm. Please help me! $<br /> 3log_2 \frac{9}{8} + 4*log_2 \frac{16}{15} - 2 log_2 \frac{24}{25}<br />$ Thanks! Please show your working - *EDIT: This is ...
4
[ -0.031982421875, 0.0185546875, 0.06640625, -0.061279296875, 0.029296875, -0.154296875, -0.057861328125, 0.030517578125, 0.0260009765625, 0.02783203125, 0.0240478515625, -0.080078125, -0.0174560546875, 0.07763671875, 0.0218505859375, 0.0771484375, -0.0556640625, 0.06787109375, -0....
35,150
35150
A couple induction set proofs February 17th 2009, 09:10 PM noles2188 A couple induction set proofs Prove the following statements 1) Prove: There is just one minimal induction set. I know that there cannot be two minimal induction sets, but this says there does not exit zero minimal induction sets. I'm...
5
[ -0.07275390625, 0.0458984375, 0.01007080078125, 0.0159912109375, 0.0400390625, 0.0810546875, 0.0020751953125, 0.03759765625, 0.0001373291015625, -0.054443359375, -0.0888671875, -0.08349609375, 0.035400390625, -0.080078125, -0.056884765625, -0.020263671875, -0.01336669921875, -0.023...
35,151
35151
Matrix Operations February 17th 2010, 06:23 PM Sprintz Matrix Operations Hi all; I have two quick Linear Algebra questions that I am struggling with. I think they are connected. #1) Suppose CA = I(sub)n (the n * n identity matrix). Show that the equation Ax = 0 has only the trivial solution. Explain why A c...
5
[ -0.115234375, 0.0093994140625, -0.039306640625, 0.00921630859375, -0.0189208984375, -0.0263671875, 0.0303955078125, -0.010009765625, 0.0281982421875, 0.03173828125, 0.0303955078125, -0.0419921875, 0.042236328125, 0.0162353515625, -0.0498046875, 0.040283203125, -0.025634765625, 0.00...
35,152
35152
Polynomial Functions-Factoring June 17th 2008, 09:04 PM #1 Newbie Joined Jun 2008 Posts 1 Polynomial Functions-Factoring Im having trouble with this problem in particular involving a complex trinomial 6x^2y^3 - 18x^3y^2 + 21x^2y i know i need to divide them all by 3x^2y but what are my steps af...
4
[ -0.004852294921875, -0.0294189453125, -0.040283203125, 0.041259765625, 0.04248046875, 0.052978515625, -0.064453125, -0.07568359375, -0.0238037109375, -0.01025390625, 0.0888671875, -0.033203125, 0.04443359375, 0.0458984375, 0.06396484375, 0.056396484375, -0.0966796875, 0.01428222656...
35,153
35153
Need help with these convergence Tests? November 28th 2010, 06:35 PM Playthious Need help with these convergence Tests? Do these converge absolutely, conditionally, or diverge? sigma from n = 1 to infinity of (n + 1)^2 / n! sigma from n = 1 to infinity of (1/ (arctan(n))^(2n) explain please! Nove...
5
[ -0.045654296875, -0.10498046875, 0.051025390625, 0.07080078125, 0.0172119140625, 0.0240478515625, -0.056884765625, 0.059814453125, 0.037109375, -0.021728515625, 0.0130615234375, -0.0164794921875, -0.0025787353515625, 0.06787109375, -0.10595703125, -0.04833984375, 0.0712890625, -0.0...
35,154
35154
Cost-Benefit Analysis CBA 100401 Discounting, Inflation, and the Social Discount Rate Guide to readings • Most material in Chapter 6 in text is straightforward and just make sure you know it. I will just review some important po...
5
[ -0.0101318359375, 0.021240234375, -0.06787109375, 0.01422119140625, 0.05908203125, 0.11572265625, -0.01397705078125, 0.068359375, 0.0242919921875, 0.08740234375, 0.0546875, -0.006866455078125, 0.057373046875, -0.050048828125, 0.0169677734375, -0.0198974609375, 0.00555419921875, -0....
35,155
35155
Finding the equation of a circle given it pases through the 4 vertices of a pyramid? December 24th 2010, 07:34 AM #1 Junior Member Joined Nov 2009 Posts 60 Finding the equation of a circle given it pases through the 4 vertices of a pyramid? In 3D Euclidian Vector geometry, if given the 4 vertices of a (T...
4
[ 0.01513671875, 0.045166015625, -0.0859375, -0.0174560546875, -0.0235595703125, 0.01513671875, -0.0400390625, 0.0693359375, 0.031982421875, 0.033935546875, -0.041748046875, 0.032958984375, -0.042236328125, -0.00182342529296875, -0.005767822265625, 0.0201416015625, -0.0361328125, 0.0...
35,156
35156
Limit Questions January 17th 2010, 02:03 PM #1 Newbie Joined Jan 2010 Posts 20 Limit Questions Any help would be wonderful, please work out the answers too, I'm just learning! lim x→ 2 x^2−4x+4 / x^2+x−6 lim x→ 0 x / |x| lim x→ 1 x^3−1 / x−1 lim ...
4
[ 0.00994873046875, 0.000644683837890625, -0.0093994140625, -0.006103515625, 0.06787109375, 0.04052734375, -0.006500244140625, -0.005889892578125, 0.042724609375, -0.00970458984375, 0.11083984375, -0.04296875, -0.032958984375, -0.0439453125, -0.03564453125, 0.030517578125, 0.0037231445...
35,157
35157
Trig help. October 1st 2007, 11:21 AM #1 Junior Member Joined Mar 2007 Posts 36 Trig help. I need help on these questions please. 1. given that sin^2 x + cos^2 x = 1 show that 1+cot^2 x = cosec^2 x 2. Solve for values x in the interval -pi<x<pi for the following in 2 decimal places: a. 2co...
4
[ -0.050537109375, 0.06005859375, 0.04541015625, 0.09228515625, 0.00225830078125, 0.05322265625, 0.010986328125, 0.006134033203125, 0.050537109375, -0.01611328125, 0.0546875, -0.072265625, -0.01446533203125, 0.0034027099609375, -0.0284423828125, -0.02783203125, 0.051513671875, -0.019...
35,158
35158
Problem - Finite Abelian Group - Order of each element is = 2 September 5th 2009, 11:49 PM #1 Super Member Joined Apr 2009 Posts 677 Problem - Finite Abelian Group - Order of each element is = 2 Problem: G = {a1,a2,a3,..,an} is a finite abelian group where order of each element (except of identity of-cou...
5
[ -0.01055908203125, 0.017822265625, 0.11181640625, -0.0020751953125, 0.0162353515625, -0.03564453125, -0.00653076171875, -0.03759765625, -0.08251953125, 0.0294189453125, -0.005706787109375, -0.0546875, 0.00152587890625, -0.10791015625, 0.00872802734375, 0.1552734375, 0.034423828125, ...
35,159
35159
Math Forum Discussions Math Forum Ask Dr. Math Discussions Internet Newsletter MathTools Teacher2Teacher Teacher Exchange Workshops Search All of the Math Forum: Views expressed in these public forums are not endorsed by Drexel University or The Math Forum. Topic: well-ordering the reals Replies: 2 Last Post: Jan ...
4
[ -0.130859375, -0.0107421875, 0.036865234375, 0.037841796875, -0.0191650390625, 0.04248046875, -0.083984375, 0.058837890625, 0.010498046875, 0.030029296875, -0.0216064453125, 0.060302734375, 0.032470703125, 0.0311279296875, 0.003082275390625, -0.043212890625, 0.045166015625, -0.0095...
35,160
35160
Matrix of a Nilpotent Operator Proof March 27th 2011, 02:40 PM #1 Junior Member Joined Apr 2010 Posts 50 Matrix of a Nilpotent Operator Proof I'm trying to understand this one proof about the matrix of a nilpotent operator and I'm stuck on this one part. Here is the theorem I'm trying to prove and how th...
4
[ -0.040283203125, 0.0693359375, -0.03466796875, 0.04150390625, -0.035400390625, 0.03857421875, 0.0115966796875, -0.10302734375, 0.0167236328125, -0.11572265625, -0.01806640625, -0.004791259765625, -0.06982421875, -0.0225830078125, -0.0250244140625, 0.040771484375, -0.01287841796875, ...
35,161
35161
On intermediate transitive models for ZFC between M an M[G] up vote 5 down vote favorite 1 Let $P$ be a forcing notion. Let $B(P)$ be the boolean completion of $P$ and $i : P \rightarrow B(P)$ be the corresponding dense embedding (in $B(P)^{+}$). Let $G$ be $B(P)$-generic over $M$, the transitive ground model satisfyi...
4
[ 0.039306640625, -0.10400390625, 0.0654296875, 0.0023040771484375, 0.049072265625, 0.032958984375, 0.0517578125, -0.0194091796875, -0.0162353515625, -0.0673828125, -0.0294189453125, 0.03173828125, 0.040283203125, 0.0211181640625, 0.019287109375, 0.0771484375, 0.134765625, 0.02160644...
35,162
35162
Is this a textbook error or... June 1st 2007, 04:42 AM david18 Is this a textbook error or... I'm currently going through some questions in my textbook and came across a question on a quadratic and linear simultaneous equation. Solve the equation: x + y = 1 x^2 + y^2 = 16 I am not interested in...
4
[ -0.043212890625, 0.0927734375, 0.05322265625, 0.03076171875, 0.05712890625, -0.0174560546875, -0.047119140625, 0.01385498046875, 0.0191650390625, 0.046142578125, 0.1298828125, 0.0172119140625, -0.01416015625, 0.06982421875, -0.0169677734375, 0.0791015625, -0.00341796875, -0.0859375...
35,163
35163
Conditional Probability Problem August 30th 2008, 03:13 AM ban26ana Conditional Probability Problem Problem: Balls are drawn (one at a time) from an urn containing M balls numbered from 1 to M. The ball is kept if it is numbered 1, and returned to the urn otherwise. What is the probability that the second ba...
5
[ 0.0242919921875, -0.03955078125, 0.05224609375, 0.0159912109375, 0.006561279296875, -0.0380859375, 0.03564453125, 0.0245361328125, 0.0185546875, 0.004669189453125, -0.005859375, -0.0234375, 0.0595703125, 0.0556640625, 0.03076171875, 0.10009765625, 0.08349609375, -0.06298828125, 0...
35,164
35164
Prove the quadratic equation Word Problem Answers (8,113) Statistics Answers (2,579) Calculus Answers (5,185) Trigonometry Answers (2,301) Geometry Answers (4,542) Algebra 2 Answers (9,340) Algebra 1 Answers (22,553) Pre-Algebra Answers (11,116) A quadratic equation in the standard form is given by ax 2 + bx + c = 0 ...
4
[ -0.076171875, 0.019775390625, 0.06494140625, 0.023193359375, -0.048095703125, 0.0830078125, -0.07373046875, 0.0272216796875, -0.017333984375, 0.041748046875, 0.06396484375, -0.140625, -0.0380859375, 0.0390625, -0.017578125, 0.042724609375, -0.01495361328125, 0.0247802734375, -0.0...
35,165
35165
[SOLVED] Trigonometric integration by substitution July 2nd 2008, 07:36 PM redman223 [SOLVED] Trigonometric integration by substitution $\int \frac {1-tanx^2}{secx^2} ~dx$ I figure you have to break it up first: $\int cosx^2 ~dx - \int \frac {tanx^2}{secx^2} ~dx$ But from here, I am somewhat stuck...
5
[ 0.0247802734375, 0.0252685546875, 0.0849609375, 0.03369140625, 0.0025177001953125, 0.016845703125, -0.039306640625, -0.0341796875, 0.001617431640625, 0.03662109375, 0.049560546875, 0.03369140625, -0.04052734375, 0.040283203125, 0.021240234375, -0.0135498046875, 0.091796875, 0.03637...
35,166
35166
Vector Plane Problem May 23rd 2010, 03:34 AM #1 Newbie Joined May 2010 Posts 7 Vector Plane Problem This question has stumped me, it is the only question like this in my textbook and i can't figure out how to solve this, i'm not the best at maths so any help people could give me would be great! The ...
5
[ 0.01123046875, -0.00665283203125, -0.03173828125, -0.0244140625, 0.034423828125, 0.023681640625, 0.03515625, -0.02978515625, -0.05517578125, 0.091796875, 0.0439453125, -0.0322265625, 0.0057373046875, -0.0029754638671875, -0.027587890625, 0.03125, -0.0341796875, 0.005279541015625, ...
35,167
35167
Recommendations for binomial system solver up vote 1 down vote favorite I am interested in solving binomial systems of the form $$ \begin{cases} a_1 x_1^{d_{11}} x_2^{d_{12}} \cdots x_n^{d_{1n}} + b_1 x_1^{d_{11}} x_2^{d_{12}} \cdots x_n^{d_{1n}} &= 0 \\\\ \vdots &\vdots \\\\ a_m x_1^{d_{m1}} x_2^{d_{m2}} \cdots x_n^{...
4
[ -0.1083984375, -0.10400390625, -0.050537109375, -0.027587890625, -0.054931640625, -0.09326171875, -0.01068115234375, -0.031494140625, 0.018310546875, 0.06494140625, 0.06982421875, -0.03857421875, -0.0167236328125, 0.043701171875, 0.05419921875, 0.16015625, 0.0234375, 0.05615234375,...
35,168
35168
Another proof July 5th 2006, 04:04 PM #1 Junior Member Joined Jun 2006 Posts 53 Another proof I have to Prove (a+b)^2 + (b+c)^2 + (c+a)^2 >= 4(ab + bc + ac) I multiplied out both sides and then move everything to the left, but I don't know what I should do after that. Nichelle14 I have to P...
4
[ -0.056884765625, 0.07470703125, 0.052978515625, 0.0595703125, -0.07568359375, 0.025634765625, -0.08203125, 0.00958251953125, 0.041015625, -0.00005412101745605469, -0.05224609375, -0.0419921875, 0.042236328125, 0.06298828125, -0.0238037109375, 0.056884765625, 0.00433349609375, 0.067...
35,169
35169
Measuring the Wattage of the Sun and Labs from Chicago, Summer 1993 : Measuring the Wattage of the Sun and a "Standard Candle." Dr. Jim Sweitzer Labs written for the CARA Space Explorers, Summer 1993 This is meant to be handed out to the students. Introduction By now you should now know quite a bit about light and...
4
[ 0.0228271484375, 0.099609375, 0.0035858154296875, 0.0830078125, -0.03759765625, -0.10595703125, -0.060791015625, 0.01458740234375, -0.017333984375, 0.033447265625, 0.008544921875, -0.05029296875, 0.008056640625, 0.04345703125, -0.00848388671875, 0.0174560546875, 0.01092529296875, -...
35,170
35170
topology on the automorphism group of a C* algebra up vote 8 down vote favorite Let $A$ be a $C^*$-algebra. The group $Aut(A)$ of $\ast$-automorphisms of $A$ is usually equipped either with the pointwise norm topology, i.e. the topology generated by the semi-norms $\lVert \ varphi \rVert_a = \lVert \varphi(a) \rVert$ ...
5
[ -0.044677734375, -0.0108642578125, -0.07080078125, 0.015625, -0.0478515625, 0.06103515625, 0.0201416015625, -0.055419921875, -0.03662109375, -0.04736328125, 0.0732421875, -0.032470703125, 0.03564453125, 0.0098876953125, 0.033935546875, -0.0155029296875, -0.04541015625, -0.010559082...
35,171
35171
greatest acceleration October 2nd 2006, 12:16 PM #1 Member Joined Sep 2005 Posts 136 greatest acceleration A disc, a sphere and a thin-walled tube are placed on an incline and roll down without slip. Which will acquire the greatest acceleration? Does the answer depend on the object having the same di...
4
[ 0.0211181640625, 0.022216796875, -0.059326171875, -0.0703125, -0.06591796875, -0.037109375, -0.019775390625, 0.10791015625, 0.0177001953125, 0.031982421875, -0.03515625, 0.068359375, 0.080078125, 0.035400390625, 0.00180816650390625, 0.03515625, 0.0084228515625, 0.1162109375, -0.0...
35,172
35172
Summations of n^(-2k) Date: 09/10/2000 at 00:37:43 From: Mark Rosel Subject: Summations: What are sigma(n^-2) and sigma(n^-4) I am trying to find out what the following are: sigma(n^-2) sigma(n^-4) sigma(n^-[2k]) sigma(n^-[2k+1]) where k is an integer and all are summations from 1 to infinity. ...
5
[ -0.05712890625, 0.03662109375, 0.041015625, 0.0947265625, -0.041259765625, 0.0283203125, -0.014892578125, 0.0712890625, 0.0272216796875, -0.01239013671875, -0.05517578125, 0.000904083251953125, 0.0203857421875, -0.0267333984375, -0.1357421875, 0.00640869140625, 0.07861328125, -0.01...
35,173
35173
Equ. of normal April 17th 2006, 11:16 AM #1 Could you check this question to see if I have done it right: Question: Find the equation of the normal to the curve y=x+ 4/x at the point p where x=4. If the normal meets the curve agian at N, find the co-ordinates of N. This is what I have done: y= x+4x^-...
4
[ 0.01202392578125, -0.00762939453125, 0.032470703125, -0.032958984375, -0.0240478515625, -0.0000029355287551879883, 0.000690460205078125, 0.052978515625, -0.0255126953125, -0.0255126953125, 0.050537109375, -0.007720947265625, -0.034912109375, 0.00927734375, -0.01422119140625, 0.03369140...
35,174
35174
Property value estimation for inhaled therapeutic binary gas mixtures: He, Xe, N2O, and N2 with O2 Abstract Background The property values of therapeutic gas mixtures are important in designing devices, defining delivery parameters, and in understanding the therapeutic effects. In the medical related literature the v...
4
[ 0.0703125, -0.0166015625, -0.037353515625, 0.0267333984375, 0.0419921875, -0.031494140625, 0.10205078125, 0.138671875, -0.00616455078125, -0.060791015625, -0.049072265625, -0.00787353515625, 0.033935546875, 0.06689453125, 0.0291748046875, 0.0016021728515625, 0.11328125, 0.015563964...
35,175
35175
Maximal class of simple graphs of order $n$ with mutually distinct numbers of spanning trees up vote 8 down vote favorite 4 This problem in some ways related to this post. Let $A_n$ be the set of all integers $x$ such that there exist a connected simple graph of order $n$ having precisely $x$ spanning trees. Stud...
4
[ -0.055908203125, 0.026611328125, 0.0002727508544921875, 0.06494140625, 0.0162353515625, 0.02294921875, -0.051513671875, 0.041748046875, -0.0302734375, -0.03662109375, -0.00537109375, 0.09619140625, 0.0291748046875, -0.033447265625, -0.04736328125, 0.0311279296875, -0.004913330078125,...
35,176
35176
Inverse of a totally unimodular matrix up vote 6 down vote favorite A unimodular matrix $M$ is a square integer matrix having determinant $+1$ or $−1$. A totally unimodular matrix (TU matrix) is a matrix for which every square non-singular submatrix is unimodular. A totally unimodular matrix need not be square itself....
5
[ -0.048583984375, -0.055419921875, -0.09716796875, 0.03125, -0.00104522705078125, -0.0654296875, -0.03076171875, -0.064453125, -0.04736328125, -0.044189453125, 0.064453125, 0.00628662109375, -0.0157470703125, 0.0025634765625, -0.0810546875, 0.043212890625, 0.0771484375, 0.0603027343...
35,177
35177
Why do primes dislike dividing the sum of all the preceding primes? up vote 22 down vote favorite 3 I was investigating primes with the property that the sum of the first $n$ primes is divisible by $p_n$. It turns out that these primes are extremely extremely rare. For primes less than $10^9$, I have found that there ...
4
[ -0.07666015625, -0.10107421875, 0.0034332275390625, 0.0016937255859375, 0.1435546875, 0.038330078125, 0.049560546875, 0.09716796875, 0.019287109375, 0.0419921875, -0.0966796875, 0.07373046875, -0.01123046875, 0.00946044921875, 0.01953125, -0.12890625, 0.02197265625, -0.05615234375,...
35,178
35178
derivative problem October 7th 2009, 08:24 AM #1 Member Joined Oct 2009 Posts 79 derivative problem Y(u)=(u^-2+u^-3)(u^5-2u^2), y'=? My attempt: =(-2u^-3 + -3u^-4)(u^5 - 2u^2) + (5u^4-4u)(u^-2+u^-3) =(-2u^2-4u^-1 -3u + 6u^-2) + (5u^2 +5u-4u^-1-4u^-2) =3u^2 +2u -8u^-1+2u^-2 Where ...
4
[ -0.05126953125, -0.018798828125, 0.032958984375, 0.03515625, 0.0186767578125, -0.04150390625, -0.02783203125, -0.05615234375, -0.007537841796875, -0.01507568359375, 0.1357421875, -0.08984375, -0.04150390625, 0.0048828125, -0.037841796875, 0.04150390625, -0.051513671875, -0.07519531...
35,179
35179
small sums of entries in submatrices - strange phenomenon up vote 1 down vote favorite Suppose that $x \in \mathbb{R}^{n}$ is a vector of small positive fractions, i.e. $x_{i} \approx \frac{1}{n}$. The exact values are unknown. I form the matrix $M=diag(x)-\frac{xx^{T}}{2}$ which is a Stieltjes matrix and is diagonall...
5
[ 0.0159912109375, -0.012451171875, -0.04541015625, -0.0400390625, 0.025390625, -0.09912109375, -0.05078125, -0.0247802734375, -0.00494384765625, 0.005523681640625, -0.031982421875, 0.01031494140625, 0.029541015625, -0.06591796875, -0.0380859375, 0.032958984375, 0.1376953125, 0.02844...
35,180
35180
Slope of 3-Dimensional Equations Date: 11/12/97 at 21:31:35 From: j.keenan Subject: Slope of 3-dimensional equations Is it possible to find the slope of three-dimensional equations? Date: 11/13/97 at 18:20:49 From: Doctor Tom Subject: Re: Slope of 3-dimensional equations I'm not positive what you mean by "three-d...
4
[ -0.091796875, -0.044677734375, -0.0673828125, -0.052734375, -0.0269775390625, -0.00860595703125, -0.059326171875, 0.01153564453125, 0.0157470703125, 0.00714111328125, -0.01495361328125, 0.0184326171875, 0.02197265625, 0.11279296875, 0.07763671875, 0.0157470703125, -0.1083984375, 0....
35,181
35181
When? does the inequality solve January 1st 2007, 12:15 PM Freaky-Person When? does the inequality solve In what cases would you have to change the inequality sign? I mean, if you have an equation like, |x| + |2x-5| < 5 You would have 3 cases right? So what would the sign (< and >) look like ...
4
[ -0.0223388671875, 0.0478515625, 0.06396484375, -0.03564453125, -0.03369140625, 0.0052490234375, -0.06640625, 0.01904296875, -0.052490234375, -0.0032806396484375, 0.033203125, 0.0213623046875, 0.07958984375, -0.0130615234375, -0.0269775390625, 0.0137939453125, 0.04541015625, -0.0500...
35,182
35182
increasing or decreasing July 14th 2009, 06:04 PM #1 Junior Member Joined Jul 2009 Posts 42 increasing or decreasing the question is Let F(a) be the function which gives the area under the graph of y=x*e^-x between x=0 and x=a for a>0 i found F(a) to be (-x*e^-x)-(e^-x) then evaluated with ...
5
[ -0.0294189453125, -0.02099609375, 0.0189208984375, -0.047119140625, -0.035888671875, -0.10302734375, 0.01177978515625, 0.0615234375, -0.000858306884765625, 0.08642578125, 0.09814453125, -0.024658203125, 0.11083984375, 0.0283203125, 0.08349609375, -0.0205078125, 0.0135498046875, -0....
35,183
35183
taking trig class and forgot how to do this problem. June 23rd 2010, 07:33 PM #1 Newbie Joined Jun 2010 Posts 5 taking trig class and forgot how to do this problem. haven't taken math in a while and I'm taking a trigonometry class. I believe i learned this in algebra but i can't remember how its done. ...
4
[ -0.083984375, 0.01318359375, -0.0250244140625, -0.000881195068359375, -0.01806640625, -0.02392578125, -0.048583984375, 0.01422119140625, 0.0498046875, 0.01275634765625, 0.0556640625, -0.01080322265625, 0.01708984375, 0.042236328125, -0.052001953125, -0.042724609375, -0.07373046875, ...
35,184
35184
completely expand the ln function, then find the derivative Re: completely expand the ln function, then find the derivative Expression= lnx-ln(e^xlnx)=lnx-(lne^x+ln(lnx)=lnx-x-ln(lnx) Derivative=1/x-1-1/(xlnx) (The last term came from 1/lnx times 1/x by the chain rule) Re: completely expand the ln function,...
5
[ 0.03662109375, -0.032470703125, 0.09619140625, -0.01129150390625, 0.031005859375, -0.103515625, -0.01611328125, 0.0150146484375, 0.002593994140625, 0.0751953125, 0.0361328125, -0.018310546875, 0.01904296875, 0.00970458984375, 0.0019683837890625, -0.028076171875, -0.12158203125, -0....
35,185
35185
How to classify the algebras C^∞(M)? up vote 14 down vote favorite 8 This continues my question about smooth Gelfand-duality. In the book Juan A. Navarro González & Juan B. Sancho de Salas, C^∞-Differentiable Spaces, LNM 1824 it is shown that $M \mapsto C^\infty(M)$ is a fully faithfull contravariant functor fro...
4
[ -0.0771484375, -0.037109375, -0.052490234375, 0.032470703125, -0.07177734375, 0.07373046875, 0.000591278076171875, 0.036865234375, -0.03662109375, -0.0250244140625, 0.048828125, -0.036376953125, -0.035888671875, 0.0118408203125, 0.047607421875, 0.007080078125, 0.068359375, 0.065429...
35,186
35186
Simple Probability Problem October 10th 2008, 09:16 PM #1 Senior Member Joined Jul 2008 Posts 347 In a particular town 60% of the population are women. 4% of the men and 1% of the women are taller than 180 cm. i) What % of the town's population is taller than 180 cm? ii) If a person is chosen at...
5
[ 0.08935546875, 0.052001953125, 0.0673828125, 0.0159912109375, -0.00160980224609375, -0.01953125, 0.006317138671875, -0.01409912109375, -0.076171875, 0.052490234375, 0.0986328125, -0.11083984375, 0.050537109375, -0.004669189453125, 0.05419921875, 0.04736328125, 0.018798828125, 0.038...
35,187
35187
A Circle Circumscribed about a hexagon January 12th 2010, 05:30 AM arenkun A Circle Circumscribed about a hexagon i need your help again ! help me to solve this...please :) God bless you more .(Smile) *A circle is circumscribed about a hexagon. The area outside the hexagon but inside the circle is ...
4
[ 0.025146484375, 0.11083984375, -0.060302734375, -0.021728515625, -0.01092529296875, -0.076171875, 0.0032806396484375, 0.06201171875, 0.037109375, 0.0185546875, 0.057373046875, -0.061767578125, 0.016357421875, 0.08837890625, 0.0458984375, -0.029541015625, -0.04150390625, 0.011596679...
35,188
35188
Distance Metric Proof August 17th 2010, 06:57 PM hoffmann Distance Metric Proof Say I have two lists, List1 and List2 containing elements such as words. Some words are common two both List1 and List2. I want to create a distance metric that tells me how far apart the two lists are based on a similarity "scor...
4
[ -0.0069580078125, -0.03515625, -0.11669921875, -0.0810546875, 0.0308837890625, 0.0142822265625, -0.018798828125, 0.00159454345703125, -0.07275390625, -0.03515625, 0.0142822265625, 0.0234375, 0.080078125, 0.10791015625, 0.006072998046875, 0.04443359375, 0.10888671875, -0.04516601562...
35,189
35189
Quadratic Expansion using Binomial Theorem January 7th 2012, 03:50 AM #1 Newbie Joined Jan 2012 Posts 2 Quadratic Expansion using Binomial Theorem Hi, I am stuck with a question about Binomial Expansion using Binomial Theorem, here is the question: Find, in ascending powers of x, the first 4 terms i...
4
[ 0.01953125, 0.03173828125, 0.037109375, 0.0240478515625, -0.01348876953125, 0.0260009765625, 0.0208740234375, -0.00054931640625, -0.00909423828125, -0.00066375732421875, 0.02587890625, 0.0233154296875, -0.00994873046875, -0.00830078125, -0.024169921875, 0.039306640625, 0.024536132812...
35,190
35190
Quick question on conditional expectation August 25th 2010, 04:07 AM aman_cc Quick question on conditional expectation Let x,y be continous random variables. Prove that E(E(y|x)) = E(y) I am sure this is a very basic question but still if someone can provide/guide towards a rigourous proof for the same...
5
[ -0.004119873046875, -0.033447265625, 0.046875, -0.0732421875, 0.1298828125, 0.061279296875, 0.04638671875, -0.005767822265625, -0.0419921875, 0.0147705078125, -0.012451171875, 0.078125, 0.0294189453125, 0.08056640625, 0.032958984375, 0.033935546875, -0.00164031982421875, 0.00970458...
35,191
35191
Triangle Midpoints and Vertices Date: 02/23/2003 at 11:54:32 From: Katie Subject: Geometry How do you figure out the vertices of a triangle algebraically by using its three midpoints? Date: 02/23/2003 at 20:43:30 From: Doctor Greenie Subject: Re: Geometry Hi, Katie - This problem is solved very neatly using this ...
4
[ -0.10205078125, 0.12255859375, 0.0277099609375, -0.0673828125, 0.01019287109375, 0.08447265625, -0.059814453125, 0.0673828125, 0.0096435546875, -0.033447265625, -0.007415771484375, -0.07373046875, -0.00836181640625, 0.0179443359375, 0.031982421875, 0.051025390625, -0.08251953125, -...
35,192
35192
premutation July 6th 2007, 11:57 AM #1 Newbie Joined Jun 2007 Posts 10 premutation Evaluate P(7,3) what does the p stand for and how do i solve it? the question before it was evaluate 6! (720) so it might be along those lines but is this a typo? Judging by what your previous question asked, i t...
4
[ -0.021240234375, 0.0130615234375, -0.00885009765625, -0.0146484375, -0.0537109375, 0.10400390625, 0.039306640625, -0.01239013671875, -0.00958251953125, 0.06591796875, -0.03564453125, 0.04345703125, -0.051025390625, -0.01123046875, -0.0211181640625, 0.020751953125, -0.068359375, -0....
35,193
35193
Group theory January 1st 2010, 10:17 PM #1 Super Member Joined Dec 2009 From 1111 Posts 872 Thanks 3 Group theory Hi, G={1,5,25,125} is a cyclic group under modulo 625. Is this correct? I had a course on Group theory recently. Based on the answer to the above question I want to know whe...
5
[ -0.0927734375, 0.008544921875, 0.04736328125, -0.01409912109375, -0.0281982421875, -0.054443359375, 0.06884765625, -0.048095703125, -0.0634765625, -0.0107421875, 0.0247802734375, 0.0252685546875, 0.0712890625, -0.10205078125, -0.04931640625, -0.0269775390625, -0.019775390625, -0.00...
35,194
35194
OF BIOLOGICAL SYSTEMS INTERACTING WITH FLUIDS Next: About this document A GENERAL METHOD FOR THE COMPUTER SIMULATION OF BIOLOGICAL SYSTEMS INTERACTING WITH FLUIDS Charles S. Peskin a...
4
[ -0.07666015625, -0.048583984375, -0.007781982421875, -0.08447265625, -0.049560546875, -0.039306640625, -0.0322265625, 0.0986328125, 0.052001953125, 0.00396728515625, -0.050537109375, -0.03515625, 0.0002574920654296875, 0.0732421875, -0.12109375, -0.035888671875, -0.053955078125, 0....
35,195
35195
Solutions of a exponential diophantine equation involving the $\sigma$ function up vote 2 down vote favorite 1 As usual $\sigma_k(n)$ denotes the sum of the $k$-th powers of the positive divisors of an integer $n.$ Note that $k$ is also an integer so that it may be negative. There are no odd perfect numbers known but...
4
[ -0.0277099609375, -0.0301513671875, 0.021728515625, 0.0771484375, -0.00927734375, -0.0181884765625, 0.0341796875, 0.140625, -0.0223388671875, -0.013671875, -0.0181884765625, -0.01361083984375, 0.039794921875, -0.0034332275390625, -0.04833984375, -0.000667572021484375, 0.03515625, 0...
35,196
35196
Are the categories of representations of G and C*(G) isomorphic? up vote 3 down vote favorite 2 Let G be a locally compact Hausdorff group, and C*(G) the full group C* algebra. I found in some books that "representation theory of both is the same". Can this be expressed as "the categories are equal"? (Here "represen...
5
[ -0.07275390625, -0.046875, -0.0257568359375, 0.053466796875, -0.0966796875, 0.005218505859375, -0.056396484375, -0.0260009765625, 0.059326171875, -0.12060546875, -0.06298828125, -0.060546875, -0.052734375, 0.040771484375, -0.00390625, -0.01434326171875, 0.06982421875, 0.0576171875,...
35,197
35197
Math Forum Discussions Math Forum Ask Dr. Math Discussions Internet Newsletter MathTools Teacher2Teacher Teacher Exchange Workshops Search All of the Math Forum: Views expressed in these public forums are not endorsed by Drexel University or The Math Forum. Topic: Linear System in Mathematica -- Solve returns only...
4
[ -0.115234375, -0.017822265625, -0.057861328125, 0.05419921875, 0.000812530517578125, -0.01177978515625, -0.04541015625, -0.0087890625, 0.00787353515625, 0.055908203125, 0.0380859375, -0.013427734375, 0.0361328125, 0.0203857421875, -0.054443359375, 0.0712890625, -0.0966796875, -0.08...
35,198
35198
Polynomial coefficient equivalence August 18th 2011, 08:39 PM mathnerd15 Polynomial coefficient equivalence what is the fundamental algebra result that allows you to equate coefficients for 2 polynomials if they have equal values for all values of x? and how can you replace this expression- F(x)=A(x-alph...
4
[ -0.0302734375, -0.022216796875, -0.08740234375, 0.01434326171875, -0.015625, -0.0135498046875, 0.039306640625, -0.02490234375, 0.0263671875, -0.07666015625, 0.030517578125, -0.03369140625, 0.04638671875, 0.0281982421875, 0.0076904296875, 0.0228271484375, -0.0859375, 0.05224609375, ...
35,199
35199