content
string
quality_label
int64
meta
string
all-MiniLM-L6-v2_embedding
list
doc_id
int64
unique_id
string
Surface integral. July 18th 2010, 02:15 PM #1 Newbie Joined Jul 2010 Posts 3 Surface integral. Calculate $\int {x^2 zds}$ Being S the external surface of $x^2 + y^2 = a^2$ understood between $z = -2$ and $z = 2$ Last edited by mr fantastic; July 19th 2010 at 12:03 AM. Reason: Re-titled. $x^2+ y...
5
[ -0.048583984375, 0.0673828125, -0.032958984375, -0.05322265625, 0.059326171875, -0.00689697265625, 0.056396484375, 0.07373046875, 0.0068359375, 0.06982421875, 0.03076171875, 0.07763671875, 0.056396484375, 0.07861328125, -0.0537109375, 0.0208740234375, -0.0537109375, 0.05322265625, ...
36,100
36100
t What is 3.75 x 32? Student 1 1. 32 x 3 = 96 2. I think of 0.75 as 3/4, and 1/4 of 32 is 8, so 3/8 is 24 3. 96 + 24 = 120 Student 2 1. I rounded 3.75 to 4, and did 32 x 4 = 128 2. Since it’s 1/4 less, and 1/4 of 32 is 8, I subtracted 8 from 128 to get 120 Student 3 I changed the pro...
4
[ 0.0732421875, 0.048828125, 0.0269775390625, -0.059814453125, -0.05126953125, -0.109375, 0.0184326171875, 0.0267333984375, 0.006195068359375, 0.10791015625, 0.03564453125, -0.095703125, 0.06591796875, 0.01470947265625, 0.00086212158203125, 0.0162353515625, -0.09814453125, 0.05273437...
36,101
36101
Average Value of a function February 10th 2009, 02:56 PM #1 Member Joined Feb 2009 Posts 125 Average Value of a function Can someone please explain how to find the average value of a function Say I have f(x)=X^2+2 on [1,4]. I think I have to to 1/b-a, but that is about all I know to do. 1/(a-b)...
4
[ 0.044189453125, -0.01611328125, 0.0537109375, -0.041259765625, -0.0361328125, -0.01141357421875, -0.029052734375, 0.08740234375, -0.004302978515625, -0.036376953125, -0.0537109375, -0.0751953125, 0.06396484375, 0.04150390625, -0.0281982421875, 0.04833984375, 0.02490234375, -0.01263...
36,102
36102
Use Lagrange multipliers to find the dimensions of a rectangular box February 23rd 2010, 05:23 PM #1 Newbie Joined Feb 2010 Posts 6 Use Lagrange multipliers to find the dimensions of a rectangular box of maximum volume such that the sum of the lengths of its 12 edges is a constant c. So you want to m...
4
[ 0.076171875, 0.0859375, -0.043212890625, -0.0849609375, -0.09033203125, 0.005584716796875, -0.049072265625, 0.037841796875, -0.08935546875, 0.00982666015625, -0.0849609375, 0.0311279296875, -0.0233154296875, 0.049072265625, -0.0230712890625, 0.033935546875, 0.0064697265625, 0.04467...
36,103
36103
triangle area November 30th 2008, 08:16 AM #1 Junior Member Joined Oct 2008 Posts 42 How do I make a function out of this problem? Express the area A of a 30-60-90 triangle as a function of the length h of the hypotenuse. The answer is (h²√3)/(8). One side of the triangle is h cos(60°) = h/2...
4
[ -0.036865234375, 0.09326171875, -0.064453125, -0.033935546875, 0.0059814453125, 0.045654296875, -0.05859375, 0.072265625, -0.057373046875, 0.01806640625, 0.035400390625, -0.04638671875, 0.0228271484375, -0.000698089599609375, 0.11474609375, 0.0712890625, -0.076171875, -0.0112915039...
36,104
36104
Invariance of curvature February 17th 2009, 05:26 PM #1 Member Joined May 2008 From Melbourne Australia Posts 207 Thanks 20 Invariance of curvature A curve is defined as y=f(x) and has curvature: $\frac {y''} {(1+y'^2)^{3/2}}$ show that the curvature is invariant under rotation of the a...
4
[ -0.034912109375, -0.0654296875, -0.013427734375, -0.053466796875, 0.0234375, -0.00396728515625, -0.0034027099609375, -0.01373291015625, -0.015869140625, 0.0145263671875, 0.08642578125, 0.0439453125, -0.0849609375, 0.0595703125, -0.00341796875, 0.048583984375, -0.08837890625, 0.0617...
36,105
36105
[SOLVED] trapezoid problem area June 4th 2008, 05:32 PM #1 Newbie Joined Jun 2008 Posts 2 [SOLVED] trapezoid problem area this is a tough problem and i just can't seem to solve it. please help, thank you there is a trapezoid EFZD. top left is E, top right is F, bottom right is Z, and bottom left is ...
4
[ 0.0771484375, 0.1513671875, 0.007781982421875, -0.05517578125, -0.02880859375, 0.0079345703125, 0.004913330078125, 0.08349609375, -0.068359375, 0.06103515625, 0.004608154296875, -0.015380859375, 0.003753662109375, 0.0306396484375, 0.021240234375, -0.0242919921875, -0.06982421875, 0...
36,106
36106
prime numbers November 18th 2012, 10:37 PM #1 Newbie Joined Nov 2012 From melbourne Posts 1 prime numbers Hi Something i've noticed about prime numbers. If you multiply consecutive prime numbers i.e. 2x3x5=30 and then add the other consecutive primes you get a prime or a prime x prime. ...
4
[ -0.0208740234375, -0.054931640625, -0.039306640625, -0.044921875, 0.0556640625, -0.00058746337890625, -0.006866455078125, 0.051513671875, -0.10498046875, 0.046630859375, -0.04541015625, 0.09326171875, -0.0174560546875, -0.0157470703125, -0.007171630859375, -0.0966796875, -0.04296875,...
36,107
36107
Can anyone help with this problem on Force?? September 4th 2013, 09:45 AM #1 Junior Member Joined Sep 2013 From texas Posts 73 Can anyone help with this problem on Force?? A circulur column has a diameter of 80mm outside edge and 60mm inside edge. Both ends are fixed with equal force being applie...
5
[ -0.002685546875, 0.1396484375, -0.0634765625, -0.004791259765625, 0.0166015625, -0.07666015625, -0.0751953125, 0.1298828125, -0.09130859375, 0.07275390625, 0.0830078125, -0.049560546875, 0.05224609375, -0.01507568359375, -0.046875, 0.0625, -0.057373046875, -0.0079345703125, -0.12...
36,108
36108
Help with Kunen and recursion on wellfounded sets. November 2nd 2010, 03:51 AM sroberts Help with Kunen and recursion on wellfounded sets. Hi everyone, I'm a bit stuck on the proof (page 103-4 in Kunen's Set theory and independence book) of the existence of a functional class G for any class A wellfounded r...
4
[ -0.060791015625, -0.0419921875, 0.10302734375, -0.04931640625, 0.051025390625, 0.11083984375, 0.0771484375, -0.0361328125, 0.00080108642578125, 0.01806640625, -0.017822265625, 0.06396484375, -0.0172119140625, -0.031982421875, 0.058349609375, 0.037109375, 0.0029449462890625, 0.04052...
36,109
36109
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: Variance of the recursive union of events Replies:...
4
[ -0.09423828125, -0.0301513671875, 0.1005859375, 0.040283203125, -0.013916015625, 0.00909423828125, 0.032470703125, 0.08984375, 0.0498046875, 0.0218505859375, -0.041259765625, 0.052490234375, 0.09521484375, -0.0205078125, -0.0751953125, 0.03466796875, -0.0498046875, -0.05029296875, ...
36,110
36110
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: Complex analysis question Replies: 10 Last Post: J...
5
[ -0.12158203125, 0.06494140625, -0.03369140625, 0.10595703125, 0.052978515625, -0.00194549560546875, -0.004791259765625, 0.033447265625, 0.0098876953125, 0.030517578125, 0.01904296875, -0.072265625, 0.025390625, 0.07080078125, -0.021728515625, -0.0294189453125, -0.06689453125, -0.04...
36,111
36111
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: ----------- math reference Replies: 3 Last Post: A...
4
[ -0.09765625, 0.012939453125, -0.039306640625, 0.0233154296875, 0.04736328125, 0.047607421875, 0.02490234375, 0.05224609375, 0.00396728515625, -0.06396484375, -0.003265380859375, 0.0400390625, 0.035888671875, 0.06103515625, -0.043701171875, 0.00238037109375, 0.0556640625, 0.00570678...
36,112
36112
The aim of kinetic theory is to account for the properties of gases in terms of the forces between the molecules, assuming that their motions are described by the laws of mechanics (usually classical Newtonian mechanics, although quantum mechanics is needed in some cases). The present discussion focuses on dilute ideal...
4
[ -0.00830078125, 0.0224609375, -0.0023193359375, -0.017333984375, 0.0576171875, -0.031494140625, 0.0203857421875, 0.119140625, 0.023681640625, 0.0595703125, -0.046142578125, -0.038330078125, -0.0576171875, 0.031494140625, 0.048583984375, -0.056640625, 0.01300048828125, 0.02062988281...
36,113
36113
"Generators" of one-parameter groups of isometries up vote 2 down vote favorite Let $E$ be a Banach space, and let $(\sigma_t)$ be a strongly continuous one-parameter group on $E$: so for $t\in\mathbb R$, we have that $\sigma_t$ is a contraction on $E$, $\sigma_t \sigma_s=\ sigma_{t+s}$, $\sigma_0$ is the identity, an...
4
[ -0.107421875, -0.0152587890625, 0.015380859375, 0.044189453125, -0.019287109375, 0.07568359375, 0.083984375, 0.0108642578125, -0.00970458984375, -0.0791015625, 0.0537109375, 0.0155029296875, 0.0164794921875, -0.07373046875, -0.021484375, -0.034912109375, -0.008056640625, 0.01416015...
36,114
36114
Tangent plane, parametric equation of the normal July 31st 2009, 09:45 PM arbolis Tangent plane, parametric equation of the normal I must calculate 2 tangent vectors (not parallel between themselves) to the surface $z$ in $(1,2,4)$. Then find the tangent plane's to the surface $z$ in $(1,2,4)$ and I must find th...
5
[ 0.01409912109375, -0.0101318359375, -0.006927490234375, -0.0306396484375, 0.0279541015625, -0.01220703125, 0.00787353515625, 0.08642578125, -0.0306396484375, -0.0260009765625, 0.047119140625, -0.015869140625, 0.00185394287109375, 0.038330078125, -0.0703125, 0.016357421875, -0.0903320...
36,115
36115
Need help with exponential equations December 12th 2012, 03:06 AM #1 Newbie Joined Dec 2012 From at Home Posts 9 2^x + 2^x+1 + 2^x+2 = 56 The solution is the following: 2^x + 2 * 2^x+ 4 * 2^x = 56 Why is that? I don't understand how it came to this. Where did the 4 come from? How come t...
4
[ -0.0032958984375, -0.01141357421875, -0.01470947265625, 0.09033203125, 0.07373046875, -0.026611328125, 0.048095703125, 0.0274658203125, 0.0067138671875, 0.045166015625, 0.00799560546875, -0.09423828125, 0.05126953125, 0.014892578125, 0.0546875, 0.028076171875, -0.107421875, -0.0299...
36,116
36116
Super challenging definite Integral December 30th 2011, 06:51 AM #1 Newbie Joined Dec 2011 Posts 19 Super challenging definite Integral I need to solve: $\int_{-\pi \over 2}^{\pi \over 2} \frac{1}{2007^x+1}\cdot \frac{\sin^{2008}(x)}{\sin^{2008}(x)+\cos^{2008}(x )}dx$ This integral is beyond my...
5
[ -0.005462646484375, -0.022216796875, 0.0419921875, 0.042724609375, -0.0086669921875, 0.046875, -0.052734375, 0.08740234375, -0.046142578125, 0.017333984375, -0.03369140625, -0.03271484375, 0.050537109375, 0.021240234375, -0.006591796875, -0.0004405975341796875, 0.039306640625, -0.0...
36,117
36117
Homework Help Posted by Jessica on Tuesday, March 6, 2012 at 2:11pm. 1.Determine the maximum value of the function f(x)= 5^x -x^5 on the interval 0≤x≤≤2. 2. Determine the minimum value of the function f(x)= e^(-x) - 2e^x on the interval -1≤x≤2. • Calculus - Steve, Tuesday, March 6, 2012 at 2:54pm you know tha...
5
[ 0.03662109375, -0.01611328125, 0.07470703125, -0.04443359375, 0.01177978515625, -0.08056640625, -0.01055908203125, 0.1015625, -0.04345703125, -0.0115966796875, 0.02001953125, -0.0537109375, 0.028076171875, 0.0208740234375, -0.018310546875, -0.00177764892578125, -0.00147247314453125, ...
36,118
36118
My Additional Mathematics Modules - Form 4 - Statistics (Version 2012) Additional Mathematics Form 4 Topic: 7 DECISIVE (Version 2012) by NgKL (M.Ed.,B.Sc.Hons.,Dip.Ed.,Dip.Edu.M...
4
[ 0.037353515625, 0.0050048828125, 0.01025390625, -0.0230712890625, -0.00030517578125, 0.07421875, 0.0133056640625, 0.034423828125, -0.03173828125, 0.0191650390625, 0.035400390625, -0.051513671875, 0.05615234375, -0.017822265625, 0.04345703125, -0.024169921875, 0.0101318359375, -0.04...
36,119
36119
Why is this set stationary? up vote 5 down vote favorite Hi I really need a proof for the following statement by Baumgartner: There exists a stationary subset of $[\omega_2]^{\omega}$ of size $\aleph_2$. This is Exercise 38.15. in Jechs Book (2003) and you can find a hint there which goes like this: For each $\alph...
5
[ 0.0439453125, 0.0023040771484375, 0.04248046875, -0.041748046875, 0.0693359375, 0.08544921875, 0.05419921875, 0.031982421875, 0.08056640625, -0.07666015625, -0.061767578125, 0.0086669921875, -0.03173828125, -0.016357421875, 0.0498046875, -0.0111083984375, -0.044189453125, -0.057861...
36,120
36120
Classifying Cubics into Three Basic Types Date: 08/11/2002 at 15:42:55 From: Morris Waehlti Subject: Classifying Cubics into three basic types Hi, Evidently any cubic can be classified both algebraically and graphically by applying a translation and/or a y-scaling and/or an x-scaling to one of the following three ba...
4
[ -0.038330078125, -0.0927734375, -0.060546875, -0.005950927734375, 0.0208740234375, -0.00347900390625, -0.0306396484375, -0.03125, 0.007659912109375, -0.09423828125, 0.047607421875, -0.045166015625, -0.0269775390625, 0.031982421875, 0.00390625, 0.02587890625, -0.0751953125, 0.020629...
36,121
36121
functions differenciate August 23rd 2007, 05:34 PM #1 Newbie Joined Aug 2007 Posts 2 functions differenciate im terrible @ math. please help me with this! given 2 functions: f(x) = 2x, g(x) = -2x²+5x im supposed to determine the following g(f) inverse of g g (g inverse) the dif...
5
[ -0.08349609375, -0.025634765625, 0.130859375, -0.00946044921875, 0.0380859375, -0.004638671875, 0.0201416015625, 0.0277099609375, 0.0189208984375, 0.0263671875, 0.07080078125, -0.0181884765625, 0.01220703125, -0.04443359375, -0.0478515625, 0.0498046875, 0.022216796875, -0.002243041...
36,122
36122
Chapter 8 Exploring Polynomial Functions Chapter 8 Exploring Polynomial Functions Jennifer Huss 8-1 Polynomial Functions • The degree of a polynomial is determined by the greatest exponent when there is only one variable (...
4
[ -0.0299072265625, 0.0142822265625, -0.0146484375, 0.02294921875, -0.018798828125, 0.05322265625, -0.013916015625, 0.00653076171875, 0.0238037109375, 0.0322265625, -0.005706787109375, 0.0279541015625, 0.0294189453125, 0.07568359375, -0.035400390625, 0.032470703125, -0.0947265625, -0...
36,123
36123
solving a system using A^-1 May 13th 2010, 06:04 AM swiftshift solving a system using A^-1 Let A = 1 0 -1 2 1 -2 0 1 1 find A^-1 of the above matrix using inverse matrices and hence solve the bottom 2 systems: x - z = 3 2x + y - 2z = 0 y + z = 15 2x - y = 1 3x - y + z = -2...
4
[ -0.1220703125, -0.038330078125, -0.058837890625, -0.01263427734375, 0.031494140625, -0.1005859375, 0.012939453125, -0.0012359619140625, -0.052978515625, 0.0125732421875, 0.0810546875, -0.025634765625, 0.11376953125, -0.04443359375, -0.0859375, 0.04248046875, -0.0625, -0.07080078125...
36,124
36124
Closure Problem December 9th 2007, 09:09 AM mpetnuch Closure Problem Hello everyone. I am trying to prove that if $A \subseteq X$ is dense then for any open $T$ we have $T \subseteq Cl(A \cap T)$. I tried assuming not, and I arrive at the statement $t \in A^c$ and I can't see why that would be a contrad...
4
[ -0.048828125, 0.0206298828125, 0.0306396484375, -0.01348876953125, -0.0096435546875, 0.00001728534698486328, 0.1923828125, -0.0172119140625, 0.07275390625, -0.037841796875, -0.00885009765625, -0.07177734375, 0.05029296875, 0.017578125, 0.043701171875, -0.0137939453125, 0.020751953125...
36,125
36125
"Lie algebra" for a general group ? up vote 21 down vote favorite 6 Is there analog of Lie algebra for the case of topological groups which are not necessarily differentiable manifolds, and in particular for finite groups? here by "analog" i mean that it should have similar kind of relations to given group as of a fin...
4
[ -0.07568359375, -0.046875, -0.06787109375, 0.0859375, -0.07275390625, -0.0322265625, -0.035888671875, -0.09765625, 0.048828125, -0.0869140625, 0.08837890625, 0.0125732421875, -0.07373046875, 0.042236328125, 0.033203125, -0.038818359375, -0.0322265625, 0.0849609375, 0.017333984375...
36,126
36126
Fast Shadows on Rectangles back Michael Herf December 2001 December 2006 (Christmas!) update: Here's the code I gave to Andrew at DeviantArt back in 2001 (something similar to this makes the shadowed thumbnails on their site). The one I use for myself is more nicely encapsulated (no global variables and nicer encaps...
4
[ -0.09423828125, -0.00390625, 0.0245361328125, 0.025390625, 0.0218505859375, -0.08837890625, -0.0228271484375, -0.040771484375, -0.05517578125, -0.037109375, 0.0218505859375, 0.03662109375, 0.03173828125, 0.0145263671875, -0.01611328125, 0.0234375, 0.0224609375, 0.11865234375, -0....
36,127
36127
Finding Least Common Multiple for Day Problem Date: 01/14/2004 at 19:52:32 From: Linda Subject: calendar - when a 7day and 10day fall on same day Club A meets every 7 days. Club B meets every 10 days. In how many days will the clubs meet on the same day? I used a calendar to figure this out, but there must be a ma...
4
[ 0.01263427734375, -0.0242919921875, 0.049560546875, 0.0341796875, -0.04541015625, 0.06494140625, 0.0078125, -0.04931640625, -0.04443359375, -0.06396484375, -0.0145263671875, -0.09521484375, 0.0244140625, 0.07275390625, 0.11083984375, 0.00738525390625, -0.0693359375, 0.0159912109375...
36,128
36128
System non-linear ODE's January 23rd 2010, 02:20 PM idaios System non-linear ODE's Hi all, I have a dynamical system of two non-linear autonomous ODE's. The general form is q'[t] = F_1(q,z) z'[t] = F_2(q,z) Actually, I'm interested in the function q[t], given some initial conditions q[0] an...
5
[ -0.15234375, 0.029541015625, -0.01336669921875, 0.07470703125, -0.04638671875, -0.046142578125, -0.01129150390625, 0.056396484375, 0.00872802734375, 0.0458984375, 0.008056640625, -0.0032806396484375, 0.05224609375, 0.0130615234375, -0.0634765625, -0.010498046875, -0.044677734375, -...
36,129
36129
How to factor this square root out? May 11th 2010, 12:57 PM chutsu How to factor this square root out? Hi So I have this seemingly simple, but I just don't see how this works? $<br /> \frac{C[(M_1 + M_2) \pm \sqrt{(M_1 + M_2)^2 - (M_1 M_2)(Ka)^2}]}{(M_1 M_2)}<br />$ To $<br /> \frac{C(M_1 + M...
5
[ -0.0086669921875, -0.0172119140625, 0.01214599609375, 0.056396484375, -0.02490234375, -0.045166015625, -0.14453125, 0.06787109375, 0.025390625, 0.010009765625, 0.05517578125, -0.07177734375, 0.06787109375, 0.00567626953125, -0.04443359375, 0.1103515625, 0.050048828125, 0.072265625,...
36,130
36130
Homework Help Posted by Jeconiah on Tuesday, February 19, 2013 at 5:56am. simpliy the following: (a) {[4x^2-49]/[8x^3+27]} *{ [4x^2+12x+9]/[2x^2-13x+21]} (b) {[x^2+x-6]/[x^2+7x-6]}*{[20x^2-7x-3]/[6x^2-25x+4]}*{[4x^2-11x-3]/[6x^2-19x+3]} • Algebra - Steve, Tuesday, February 19, 2013 at 11:57am Here's (a): ...
4
[ -0.045654296875, 0.1318359375, -0.0022430419921875, 0.09326171875, -0.0123291015625, 0.06787109375, -0.01007080078125, -0.04052734375, 0.033203125, -0.1181640625, 0.047607421875, -0.01409912109375, 0.017822265625, 0.0118408203125, -0.0703125, 0.05810546875, -0.107421875, 0.03637695...
36,131
36131
Social Networks From Math Images (Difference between revisions) ← Previous diff Next diff → Line 247: Line 247: The Configuration Model algor...
4
[ -0.0673828125, -0.022216796875, 0.040283203125, -0.042236328125, 0.0177001953125, -0.08349609375, -0.061279296875, -0.037841796875, -0.0120849609375, -0.01141357421875, 0.032958984375, 0.0203857421875, 0.04736328125, -0.056396484375, -0.002197265625, 0.0126953125, -0.0498046875, -0...
36,132
36132
Semisimple-ish rings! up vote 6 down vote favorite 2 Let S be the class of all rings R which have 1 and satisfy this condition: for every "non-zero" right ideal I of R there exists a "proper" right ideal J of R such that I + J = R. (The + here is not necessarily direct.) All semisimple rings are in S and (commutativ...
5
[ -0.03271484375, 0.048828125, -0.068359375, 0.031494140625, 0.027587890625, -0.03076171875, -0.01104736328125, -0.004180908203125, -0.061279296875, -0.040771484375, -0.06640625, 0.006134033203125, 0.09716796875, -0.05078125, 0.021240234375, -0.072265625, 0.045166015625, 0.0510253906...
36,133
36133
Value of a normal random variable. June 17th 2009, 09:27 PM shinn Value of a normal random variable. I just got another quick question related to this. "Nominal 375mL cans of soft drink have a mean content slightly above this value so that the stated contents are exceeded most of the time. Suppose the conte...
5
[ -0.0103759765625, 0.034423828125, 0.05908203125, -0.00151824951171875, 0.002777099609375, -0.115234375, 0.07373046875, 0.044677734375, 0.0250244140625, 0.06396484375, 0.04248046875, -0.053955078125, 0.07958984375, -0.005035400390625, 0.01409912109375, -0.0223388671875, 0.0947265625, ...
36,134
36134
References for Eilenberg-Zilber shuffle product up vote 8 down vote favorite 2 Most of the treatments I can find in the literature for the Eilenberg-Zilber shuffle product approach it from the point of view of simplicial sets (including the original Eilenberg-MacLane paper). I was wondering if anyone knows of a refere...
4
[ -0.07080078125, -0.0172119140625, -0.005828857421875, -0.10546875, -0.06689453125, 0.09130859375, 0.05029296875, 0.07275390625, -0.0228271484375, -0.006866455078125, 0.095703125, 0.041748046875, -0.005340576171875, 0.0244140625, 0.0556640625, 0.09619140625, -0.05859375, 0.094238281...
36,135
36135
Finding a Parametric Function October 5th 2010, 07:03 PM #1 Newbie Joined Feb 2010 From Rez Posts 21 Finding a Parametric Function Hello, I have a function f, defined parametrically. What exactly the function is can vary, but right now I'm trying to work on a quarter-circle of radius R, so $...
4
[ -0.1513671875, -0.028076171875, -0.05615234375, -0.02392578125, -0.0135498046875, 0.019775390625, -0.027587890625, 0.12890625, -0.0380859375, 0.0150146484375, 0.047119140625, 0.020263671875, -0.019287109375, 0.03857421875, 0.041015625, -0.019287109375, -0.0037841796875, -0.09667968...
36,136
36136
integration of quotient September 16th 2008, 02:22 AM #1 Newbie Joined May 2008 Posts 13 integration of quotient if anyone could help me with the integration of this quotient it would be greatly appreciated. i have tried and tried but just cant get the right integral $<br /> \int \frac{x+2}{x^2...
4
[ -0.015625, 0.031494140625, 0.05615234375, 0.00030517578125, -0.01068115234375, 0.029541015625, -0.099609375, 0.0111083984375, -0.0546875, -0.028076171875, 0.0133056640625, -0.06982421875, -0.046630859375, -0.04541015625, -0.064453125, -0.01434326171875, 0.0810546875, 0.04150390625,...
36,137
36137
find function and solve max problem March 2nd 2007, 08:28 PM #1 Newbie Joined Feb 2007 Posts 23 find function and solve max problem Suppose this fox wants to try and kill a rabbit. He has a catapult which is capable of launching a rock at 70 m/s. The fox found a completely flat spot on cartoon land (whic...
5
[ 0.10107421875, 0.038818359375, 0.029296875, -0.046875, -0.016357421875, -0.0167236328125, -0.0272216796875, 0.08837890625, -0.0810546875, 0.061767578125, -0.0177001953125, 0.020263671875, 0.0296630859375, 0.07861328125, -0.01434326171875, 0.037353515625, -0.003936767578125, -0.0177...
36,138
36138
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: Precompactness Replies: 9 Last Post: Dec 13, 2012 ...
5
[ -0.030029296875, 0.0098876953125, -0.007354736328125, 0.016357421875, 0.068359375, 0.0693359375, 0.0712890625, 0.047119140625, 0.038330078125, 0.01422119140625, -0.004547119140625, 0.04833984375, 0.00543212890625, 0.0028839111328125, 0.07275390625, -0.025146484375, 0.0019989013671875...
36,139
36139
Any irreducible component of the HIlbert scheme contains an irreducible element up vote 1 down vote favorite 2 Consider $Hilb_{d,g}$ the Hilbert scheme of curves in $\mathbb{P}^3$ of degree $d$ and genus $g$. Is it true that if $L$ is an irreducible component of $Hilb_{d,g}$ then there exists a curve $C \in L$ such th...
5
[ 0.01611328125, -0.053955078125, 0.00848388671875, -0.0068359375, 0.04150390625, 0.006683349609375, -0.0019378662109375, 0.019287109375, -0.0242919921875, -0.0869140625, -0.002532958984375, -0.0012969970703125, -0.05859375, -0.047607421875, 0.0458984375, -0.0023345947265625, -0.067382...
36,140
36140
[SOLVED] Need help solving a system of equation Trying to figure out how they are coming up with 2,3 and not 5,3 Thanks 4x+3y=17 2x+3y=13 Nevermind, rather than adding the bottom equation they subtracted it which makes it come out to 2,3 subtract the 2nd equation from the 1st you'll get 2x = 4 after solving you'll ge...
4
[ -0.09130859375, 0.00799560546875, -0.0233154296875, -0.091796875, 0.080078125, 0.004730224609375, -0.00933837890625, -0.03173828125, -0.0341796875, 0.0084228515625, 0.10205078125, -0.048095703125, 0.0361328125, -0.027099609375, 0.027587890625, 0.0693359375, -0.10546875, -0.01263427...
36,141
36141
Trigonometric Identity - All that Good Stuff! November 8th 2009, 09:35 AM saintv Trigonometric Identity - All that Good Stuff! Well guys, I really would appreciate it were someone able to prove to me this: cos^2x-sin^2x = (1-tan^2x)/(1+tan^2x) I think the left side equals cos(2x), but I'm not even sure...
4
[ -0.036376953125, 0.08154296875, 0.07275390625, 0.11083984375, 0.0146484375, 0.0439453125, 0.01263427734375, -0.044677734375, 0.01373291015625, 0.0615234375, 0.0546875, -0.0250244140625, -0.00408935546875, 0.037841796875, -0.0034332275390625, -0.0026702880859375, 0.0771484375, 0.044...
36,142
36142
Rationale for Hadamard's finite part of a divergent integral up vote 7 down vote favorite 2 (Note: I asked this question a few days ago on math.stackexchange but didn't get any responses. I've therefore decided to post it here instead.) I have a problem justifying the throwing away the divergent term in order to obta...
5
[ -0.07373046875, -0.0157470703125, 0.0693359375, 0.01519775390625, 0.0458984375, 0.027587890625, -0.0126953125, -0.005401611328125, 0.0230712890625, 0.041015625, -0.010498046875, 0.029296875, 0.1044921875, 0.01190185546875, -0.0302734375, -0.003570556640625, 0.01544189453125, -0.035...
36,143
36143
annihilator/common left multiple of matrix polynomials up vote 4 down vote favorite 2 Let $A_{n,d}$ be the space of polynomials of degree $d$ or less whose coefficients are real $n\times n$ matrices --- or, if you prefer, the space of matrices whose entries are degree-$d$ polynomials. Given $A(z),B(z)\in A_{n,d}$, the...
4
[ -0.1416015625, 0.036376953125, -0.0771484375, 0.05029296875, -0.0546875, 0.041259765625, 0.0228271484375, -0.05615234375, 0.0546875, -0.04443359375, 0.03173828125, -0.00811767578125, 0.0162353515625, -0.00188446044921875, -0.033935546875, 0.08203125, -0.033203125, 0.020263671875, ...
36,144
36144
help finding sum of series April 30th 2009, 01:11 AM adhyeta help finding sum of series got 2 series. 1. 1^2 - 2^2 + 3^2 - 4^2 + ................. 99^2 - 100^2 (ok those are just squares) 2. 1.1! + 2.2! + ....... 50.50! need to find sum... April 30th 2009, 03:07 AM pickslides ...
4
[ -0.052001953125, 0.0289306640625, 0.02880859375, -0.06103515625, -0.00946044921875, 0.03857421875, -0.044921875, 0.06884765625, -0.0020294189453125, 0.015625, -0.01019287109375, -0.007232666015625, 0.0126953125, 0.000518798828125, -0.0341796875, -0.0191650390625, 0.0546875, -0.0529...
36,145
36145
Sum over Hypergeometric function 2F1 (generating function) up vote 0 down vote favorite Dear mathematicians, in my current research project I came accross this very bothersome sum over a rather simple hypergeometric function, or formulated differently: a sum over squared binomial coefficients: $\sum_{b=0}^\infty Y^b...
5
[ 0.00677490234375, -0.0308837890625, -0.01513671875, 0.0186767578125, -0.0203857421875, 0.0025787353515625, 0.068359375, -0.09130859375, 0.03662109375, 0.00060272216796875, -0.04052734375, -0.01055908203125, -0.025146484375, 0.008056640625, 0.0302734375, 0.109375, -0.010498046875, -...
36,146
36146
Surface area of revolution [another question] March 8th 2010, 09:41 AM #1 Member Joined Oct 2008 Posts 157 Surface area of revolution [another question] The curve $C$ has equation $y =\frac{1}{2}x^2$. a] use the substitution $x=sinhu$ to evaluate the arc length of $C$ correct to 2 decimal place...
4
[ 0.07470703125, 0.01263427734375, 0.050537109375, -0.035888671875, 0.02001953125, -0.030029296875, -0.0400390625, 0.109375, -0.0220947265625, 0.00714111328125, 0.01300048828125, -0.006439208984375, -0.0159912109375, 0.0169677734375, -0.033935546875, 0.046875, 0.0159912109375, -0.026...
36,147
36147
induction help April 19th 2010, 01:42 AM #1 Super Member Joined Oct 2007 From Santiago Posts 517 induction help Hey guys, im really struggling with induction. Question: Use induction to prove that 1 + 7 + 19 +..... + ( $3n^2 - 3n + 1$) = $n^3$ for all positive integers $n$ by completing the following...
5
[ -0.057861328125, 0.0218505859375, 0.0361328125, 0.05859375, -0.037353515625, 0.0458984375, 0.1005859375, -0.0172119140625, -0.016845703125, -0.0517578125, -0.0634765625, -0.01953125, 0.0625, 0.00013828277587890625, -0.0390625, -0.08935546875, -0.0308837890625, 0.0277099609375, 0....
36,148
36148
Ploynomial... January 25th 2011, 05:43 AM #1 Junior Member Joined Jan 2011 Posts 58 Ploynomial... Not sure if im going mad but struggling with this (a) Write down the polynomial P in x, y such that: x^6 − y^6 = (x^2 − y^2)*P. Many thanks in advance. Hint : Denote $t=x^2$ and $a=y^2...
4
[ -0.01226806640625, 0.052490234375, -0.050537109375, 0.005767822265625, -0.052734375, 0.0191650390625, 0.04150390625, -0.0341796875, 0.0216064453125, -0.038330078125, 0.0228271484375, 0.0537109375, -0.053466796875, 0.0263671875, 0.060302734375, 0.06689453125, -0.11669921875, 0.05322...
36,149
36149
How big can the irreps of a finite group be (over an arbitrary field)? MathOverflow is a question and answer site for professional mathematicians. It's 100% free, no registration required. Let G be a nontrivial finite group. Does there exist an irreducible representation of G of dimension ...
5
[ 0.023681640625, -0.046630859375, -0.0146484375, 0.07470703125, 0.00131988525390625, 0.01953125, -0.01409912109375, -0.031494140625, 0.060791015625, -0.042724609375, -0.0634765625, 0.040771484375, 0.0028839111328125, 0.00186920166015625, -0.046630859375, -0.00482177734375, -0.00039672...
36,150
36150
Big Oh question November 22nd 2011, 07:52 PM #1 Junior Member Joined Oct 2009 From London Posts 42 Big Oh question I am trying to prove an idientity I have come accross in a book: $\log\left(\log t-\log\log t+O\left(\frac{\log\log t}{\log t}\right)\right)=\log\log t-\frac{\log\log t}{\log t}-\fr...
4
[ 0.02685546875, -0.000675201416015625, 0.07275390625, 0.03759765625, 0.0576171875, -0.1005859375, 0.000008821487426757812, 0.00885009765625, 0.060302734375, 0.055419921875, -0.000637054443359375, 0.103515625, 0.0174560546875, 0.0189208984375, 0.038330078125, 0.033935546875, -0.0025939...
36,151
36151
Trouble with Integration July 11th 2011, 06:27 AM #1 Trouble with Integration f:R ---> R is a continuous function and f(x) = f(2x) is true for all real numbers If f(1)=3 then find the value of $\int_{-1}^{1}f[f(x)] dx$ Re: Trouble with Integration Necessary condition: Taking into account that $g(x)=...
5
[ -0.037109375, -0.07958984375, 0.036865234375, 0.02392578125, -0.01953125, -0.0322265625, 0.029052734375, -0.00152587890625, -0.06884765625, 0.006744384765625, -0.00823974609375, -0.0673828125, 0.00457763671875, 0.038330078125, 0.007720947265625, -0.043212890625, 0.032958984375, 0.0...
36,152
36152
Modular Inversion August 27th 2010, 07:47 PM #1 Modular Inversion I have another problem from computational number theory. Given $\alpha_1,\alpha_2,\ldots, \alpha_k\in \mathbb{Z}_n$, show how to compute $\alpha_1^{-1}, \alpha_2^{-1}\ldots, \alpha_k^{-1}$ by computing only one inverse and using at most $3k$ ...
4
[ -0.064453125, -0.0205078125, -0.04638671875, -0.00021648406982421875, 0.0023345947265625, -0.142578125, 0.056884765625, -0.019775390625, -0.0021514892578125, -0.09326171875, -0.04638671875, 0.060791015625, 0.01348876953125, -0.0771484375, -0.087890625, 0.0654296875, 0.04052734375, ...
36,153
36153
Rational Function Inequality October 11th 2009, 05:00 PM Isimbot Rational Function Inequality 3x-5 ______ -1 is less than or equal to 0 x - 3 Doesn't the -1 change everything? What would be a zero normally, is now a negative one. So should I find the zeros without considering the -1 then add 1 t...
4
[ -0.109375, 0.004241943359375, 0.00982666015625, -0.0556640625, -0.0289306640625, -0.037109375, -0.0024566650390625, -0.01251220703125, 0.02294921875, 0.0057373046875, 0.039794921875, -0.05908203125, 0.10986328125, 0.07421875, 0.00005626678466796875, 0.037109375, 0.0174560546875, -0...
36,154
36154
Math Help I have a problem i dont have the solution manual too and i am stumped on how to complete. This could be a trigonometric substitution? $\int_1^2 \frac {dx}{x \sqrt {4 + x^2}}$ this is what i came up with but i dont think its right.. $x = 2 tan \theta$ $dx = 2 sec^2 \theta$ an...
4
[ 0.068359375, -0.030517578125, 0.058837890625, 0.007049560546875, 0.0169677734375, -0.034423828125, -0.00634765625, 0.05419921875, 0.0169677734375, -0.0791015625, 0.060302734375, -0.022705078125, -0.05224609375, 0.039794921875, -0.032958984375, 0.05517578125, 0.0400390625, 0.1088867...
36,155
36155
Which of the following describes the behavior of y=(x+2)^(1/3( December 15th 2009, 09:10 PM craz Which of the following describes the behavior of y=(x+2)^(1/3( Which of the following describes the behavior of y=(x+2)^(1/3) a) cusp b) corner c) vertical tangent how do you prove it/figure it out?...
4
[ -0.03955078125, -0.0869140625, -0.0947265625, 0.0478515625, 0.00170135498046875, -0.03369140625, -0.033203125, 0.0439453125, 0.078125, 0.0230712890625, 0.08544921875, -0.02392578125, 0.00154876708984375, 0.05029296875, 0.050048828125, 0.0032501220703125, -0.0888671875, -0.030639648...
36,156
36156
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: The Human Voice's Mathematical Frequency - Part 12...
4
[ -0.0830078125, 0.04638671875, 0.006500244140625, -0.057373046875, -0.11767578125, 0.0079345703125, 0.044189453125, 0.057373046875, 0.0341796875, 0.0206298828125, 0.0791015625, 0.042724609375, 0.05224609375, 0.0206298828125, -0.033203125, -0.12890625, -0.08837890625, 0.048828125, ...
36,157
36157
Find complete set of integer solutions January 28th 2011, 07:11 PM #1 Member Joined Jan 2011 Posts 79 Find complete set of integer solutions Find the complete set of integer solutions in x and y to 821x + 1997y = 24047: Determine all solutions with x > 0 and y > 0. I started by finding th...
5
[ -0.0064697265625, 0.0189208984375, -0.052490234375, -0.0301513671875, 0.056640625, -0.06201171875, 0.08447265625, 0.041259765625, -0.0908203125, -0.051513671875, 0.06689453125, 0.031982421875, 0.0289306640625, 0.0179443359375, 0.056640625, 0.0220947265625, -0.06982421875, -0.036621...
36,158
36158
A problem from a grade 9 math competition March 19th 2009, 01:57 AM #1 A problem from a grade 9 math competition I don't know whether I posted in the proper forum. This is a question from a 2009 grade 9 math competition. The question Starting with the input (m,n), Machine A gives the output (n,m). ...
4
[ -0.056884765625, 0.01409912109375, -0.044189453125, -0.056884765625, -0.09619140625, 0.08251953125, -0.025146484375, -0.0128173828125, -0.05224609375, -0.01806640625, -0.0306396484375, 0.007049560546875, 0.07373046875, -0.01953125, -0.05712890625, 0.08349609375, -0.06884765625, 0.0...
36,159
36159
Modular arithmetic February 28th 2010, 09:03 AM integral Modular arithmetic $\textrm{I\; am\; trying\; to\; learn\; modular\; arithmetic,\; and\; this\; right \; here\; stumped\; me.}$ $<br /> 10\cdot(-13)+27\cdot 6\equiv-122\mathrm{mod}2$ $<br /> <br /> \textrm{I\; thought\; It\; would\; go\; like\; thi...
4
[ -0.11279296875, 0.022705078125, 0.00189971923828125, -0.01904296875, 0.0003681182861328125, -0.006683349609375, 0.0037841796875, 0.1064453125, -0.0181884765625, -0.060546875, 0.10546875, -0.00135040283203125, 0.050537109375, 0.041748046875, -0.0205078125, -0.0478515625, -0.0844726562...
36,160
36160
Square Roots and Irrational Numbers Date: 10/08/97 at 17:00:17 From: Terry Dobbins Subject: Irrational numbers My question is: Will all square roots of positive numbers that are not perfect squares be irrational numbers? I am a new teacher and this was asked of me by another teacher. I think that it is a true state...
4
[ 0.0272216796875, -0.004730224609375, 0.042236328125, 0.11279296875, -0.020751953125, 0.03173828125, -0.0380859375, 0.01116943359375, 0.01348876953125, -0.0152587890625, 0.0003871917724609375, 0.0252685546875, 0.042236328125, 0.072265625, -0.0299072265625, 0.0206298828125, -0.00793457...
36,161
36161
Stein's method proof of the Berry-Esséen theorem up vote 3 down vote favorite 2 The relevant paper is "An estimate of the remainder in a combinatorial central limit theorem" by Erwin Bolthausen. I would like to understand the estimate on page three right before the sentence "where we used independence of $S_{n-1}$ and...
4
[ -0.050537109375, -0.0157470703125, -0.004058837890625, -0.0147705078125, 0.07275390625, 0.06298828125, 0.032470703125, 0.1337890625, -0.03466796875, 0.0211181640625, -0.052001953125, 0.10546875, 0.06494140625, -0.1357421875, -0.10107421875, -0.03125, 0.0252685546875, -0.12060546875...
36,162
36162
Evaluating improper integral November 11th 2009, 05:31 AM #1 Junior Member Joined Oct 2009 Posts 30 Evaluating improper integral $\int_e^{\infty} \frac{1}{x(\ln x)^3} dx$ First i made a u-substitution by making u = ln x. After which i got $-\frac{1}{2(\ln x)^2}$ Then i went back to compute t...
5
[ -0.027587890625, -0.048583984375, 0.0096435546875, -0.037353515625, 0.050537109375, -0.08935546875, -0.043701171875, -0.0673828125, -0.021240234375, -0.01116943359375, 0.0703125, 0.045166015625, -0.01318359375, 0.01953125, 0.0179443359375, 0.0301513671875, -0.01434326171875, -0.003...
36,163
36163
Pi and the primes: a pattern related to the Ulam spiral up vote 14 down vote favorite 4 I have recently been considering the spiral packing pattern (illustrated here) which often appears in plants, and arises by placing the n^th point at distance n from the origin and angle 2nπ/φ where φ is the golden ratio. I wondere...
4
[ -0.0888671875, -0.031494140625, -0.06884765625, 0.042236328125, 0.0126953125, -0.00531005859375, 0.0033721923828125, 0.049560546875, 0.08544921875, -0.0069580078125, 0.0576171875, 0.0673828125, 0.007293701171875, 0.00075531005859375, -0.005279541015625, -0.0810546875, -0.022094726562...
36,164
36164
Szőkefalvi-Nagy's unitarizability theorem in the Calkin algebra? up vote 22 down vote favorite 8 Here's a research problem, which I think interesting. Suppose that $t$ is an invertible element in the Calkin algebra $\mathcal{Q} = \mathcal{B}(\ell_2)/\mathcal{K}(\ell_2)$ which satisfies $\sup_{n \in \mathbb{Z}} \|t^n\|...
4
[ -0.0966796875, -0.010498046875, -0.07177734375, 0.0036773681640625, -0.0289306640625, -0.006011962890625, 0.01904296875, -0.054443359375, 0.0185546875, -0.0908203125, -0.0089111328125, -0.00115203857421875, 0.10888671875, 0.01446533203125, -0.0198974609375, -0.01953125, 0.04125976562...
36,165
36165
A factorisation question Factorise : (b-c)(b^3 + c^3) + (c-a)(c^3 + a^3) + (a-b)(a^3 + b^3) Hello, anshulbshah! I expanded it, then repeatedly factored "by grouping". If there is a more direct way, I hope someone finds it. Quote: Factor: . $(b-c)(b^3 + c^3) + (c-a)(c^3 + a^3) + (a-b)(a^3 + b^3)$ $b^4 - b^3c + bc^3 - c...
5
[ -0.041748046875, 0.0103759765625, -0.0155029296875, 0.039794921875, -0.038818359375, 0.0191650390625, -0.0096435546875, -0.044189453125, -0.041748046875, -0.041015625, -0.09619140625, -0.06591796875, 0.033447265625, 0.0184326171875, 0.0021514892578125, 0.0458984375, -0.005126953125, ...
36,166
36166
Integration Problem August 2nd 2009, 02:56 PM Ian1779 Integration Problem Hi I am stuck on this problem integrating the following. $\int\frac{arctan (x)}{1+x^2}dx$ In order to integrate should I be integrating by parts and seperating the function into $arctan(x)\cdot\frac{1}{1+x^2}$ Or should...
5
[ 0.034423828125, -0.015625, 0.111328125, 0.03564453125, 0.08935546875, -0.0194091796875, -0.013671875, 0.0478515625, -0.056396484375, -0.0245361328125, 0.07763671875, -0.057373046875, -0.037353515625, 0.02783203125, -0.02783203125, 0.0177001953125, 0.045166015625, 0.0115966796875, ...
36,167
36167
Egg Doubling Problem; UK & US: Naming Large Numbers Date: 5/6/96 at 19:39:11 From: Roy Cole Subject: Egg doubling problem Dear Dr. Math, If you have rectangles that are twenty-three by eighty-nine, you have one egg. The first time you double you have two eggs. The second time you have four eggs. The third you have...
4
[ 0.0179443359375, 0.01470947265625, 0.0159912109375, 0.0186767578125, -0.064453125, -0.005828857421875, -0.0281982421875, -0.0174560546875, -0.008544921875, -0.01904296875, -0.04052734375, -0.0322265625, -0.06396484375, 0.00144195556640625, 0.01214599609375, -0.03271484375, -0.0412597...
36,168
36168
Finding the Center of Two Points in Latitude/Longitude Form Date: 08/11/2006 at 07:02:46 From: Sam Subject: Center Of Two Latitude Points Hi, How can I calculate the center (expressed as a latitude value) of two latitude points? I want to find the center of a rectangle expressed in longitude and latitude. The rect...
5
[ 0.041015625, -0.00445556640625, 0.0167236328125, -0.048095703125, 0.048828125, 0.0064697265625, -0.05517578125, 0.06005859375, 0.0252685546875, -0.05322265625, -0.040771484375, -0.0244140625, -0.0135498046875, 0.07275390625, 0.0859375, -0.00011157989501953125, -0.04296875, 0.060546...
36,169
36169
2 probability theory questions! March 7th 2008, 06:36 PM #1 Junior Member Joined Feb 2008 Posts 63 2 probability theory questions! 1)A small manufacturer sells 1 car each month with a probability of 0.3; it sells 2 cars each month with a probability of 0.1 and never sells more than 2 cars per month. Let ...
4
[ 0.0751953125, -0.02490234375, 0.035400390625, -0.07568359375, -0.029296875, -0.023681640625, 0.025146484375, 0.00109100341796875, 0.05419921875, 0.0311279296875, 0.0654296875, -0.005279541015625, 0.0712890625, -0.048095703125, 0.0240478515625, 0.0693359375, -0.0030975341796875, -0....
36,170
36170
Assistance on algebra word problem March 1st 2013, 01:39 PM green11 Assistance on algebra word problem The square of a number is just the number times itself. For example, the square of 4 is 16 A.Calculate the squares of 1,2,...,9 and many other whole numbers, including 17, 34, 61, 82, 99, 123, 255, 386, an...
4
[ 0.0074462890625, 0.03466796875, 0.013916015625, -0.0067138671875, -0.03173828125, 0.1162109375, -0.01080322265625, 0.01251220703125, -0.0257568359375, -0.04736328125, -0.041259765625, 0.10302734375, 0.060302734375, 0.0286865234375, -0.03857421875, -0.0673828125, -0.02978515625, 0.0...
36,171
36171
Vigorous actions on the Cantor set up vote 9 down vote favorite 2 This is related to my previous question here: Antichains and measure-preserving actions on Boolean algebras This time I will ask something more precise. Let $G$ be a group acting by homeomorphisms on the standard Cantor set $X$ (or if you prefer, $G$...
5
[ 0.03125, -0.0419921875, 0.05517578125, -0.0038299560546875, 0.03125, 0.08056640625, 0.11328125, -0.0223388671875, 0.0228271484375, -0.025634765625, -0.0162353515625, -0.0108642578125, -0.05029296875, 0.0185546875, 0.0091552734375, -0.0235595703125, 0.01092529296875, 0.056396484375,...
36,172
36172
[SOLVED] Prove 1 + 1/2 + 1/3 + ... + 1/n > 2n/n+1 Prove that: 1 + 1/2 + 1/3 + ... + 1/n > 2n/n+1 where n > 2 This will be a proof by induction For the base case let n=2. $1+\frac{1}{2}>\frac{2(2)}{2+1}$ So $\frac{3}{2}>\frac{4}{3}$ which is true so the base case holds Now we'll assume the statement is true for n and ...
5
[ -0.0712890625, 0.022705078125, 0.162109375, 0.0341796875, -0.01708984375, -0.04638671875, -0.024658203125, 0.0908203125, -0.0240478515625, 0.01904296875, -0.142578125, -0.06884765625, -0.0194091796875, -0.01275634765625, -0.06103515625, 0.0458984375, 0.0732421875, 0.062255859375, ...
36,173
36173
Tough question I'm not strong with this, i need some help: 2(1-sin(b)sin(c)) = cos^2(b) + cos^(c) when b+c = 180 Your clue lies in "b+c=180 degrees", as now c=180-b. sin(angle) gives the vertical co-ordinate in a circle of radius 1, centre (0,0). Hence sin(b)=sin(180-b). Therefore your equation becomes $2\left (1-sin^...
4
[ -0.048095703125, 0.052734375, -0.0458984375, 0.099609375, -0.030029296875, 0.03955078125, -0.019775390625, -0.0081787109375, 0.00982666015625, 0.009521484375, -0.0341796875, -0.09228515625, 0.01513671875, 0.021728515625, 0.03466796875, 0.0096435546875, -0.047607421875, -0.002380371...
36,174
36174
Multivariable Chain Rule Help! October 13th 2009, 10:09 PM #1 Newbie Joined Oct 2009 Posts 24 Multivariable Chain Rule Help! Suppose f is a differentiable function of x and y, and g(r,s) = f(2r-s,s^2-4r). Calculate dg/dr at (1,2) and dg/ds at (1,2) given that f(1,2)=6, g(1,2)=3, df/dx(1,2)=2 and df/dy(1,...
5
[ -0.036865234375, -0.0223388671875, 0.0299072265625, -0.09228515625, 0.03271484375, 0.006622314453125, -0.06591796875, 0.033203125, -0.0184326171875, 0.0703125, 0.026123046875, 0.026611328125, 0.043701171875, -0.01397705078125, -0.0218505859375, 0.0537109375, -0.08447265625, 0.01806...
36,175
36175
polarization formula for homogeneous polynomials up vote 5 down vote favorite 2 given a homogeneous polynomial p of dgree n on $R^d$, there is a unique symmetric n-linear functional $B$ on $(R^d)^n$ such that $p(x)=B(x,..,x)$. The question is: Can we get $B$ by means of a polarization formula as in the case $n=2$ for ...
5
[ -0.099609375, -0.06298828125, -0.0712890625, -0.032958984375, -0.08740234375, 0.09326171875, 0.0264892578125, -0.0693359375, -0.0390625, 0.00726318359375, 0.000637054443359375, 0.037841796875, -0.0306396484375, 0.06689453125, 0.08349609375, 0.0791015625, -0.033935546875, 0.05444335...
36,176
36176
Eiffel Tower: Geometry Geometry and Materials The Tower is made exclusively of wrought iron, although steel was available at the time. Eiffel chose iron because steel was more expensive since it was a new development, and also beca...
4
[ 0.00154876708984375, 0.06396484375, -0.003509521484375, 0.0625, 0.0361328125, -0.052978515625, -0.07958984375, 0.039794921875, 0.05517578125, 0.0045166015625, -0.028564453125, -0.02001953125, 0.037109375, -0.041015625, -0.00787353515625, -0.03662109375, -0.0189208984375, 0.00411987...
36,177
36177
Math Forum Discussions - Re: Why study Egyptian fraction math? Date: Nov 4, 2012 7:51 AM Author: Milo Gardner Subject: Re: Why study Egyptian fraction math? A longer Planetmath paper makes the same points: http://planetmath.org/encyclopedia/EgyptianFraction2.html Prior to 2050 BCE Old Kingdom Egyptians rounded off t...
5
[ -0.07275390625, 0.04833984375, -0.01007080078125, -0.03466796875, -0.06396484375, -0.080078125, -0.08154296875, 0.03369140625, 0.02734375, 0.0322265625, -0.0703125, -0.10009765625, 0.034423828125, -0.01220703125, -0.044189453125, -0.10595703125, -0.08837890625, 0.010498046875, 0....
36,178
36178
Triviality of SK_0(Lambda) for Lambda an order in a group algebra over a $p$-adic field up vote 1 down vote favorite CR refers to Methods of Representation Theory by Charles Curtis and Irving Reiner. Let $F$ be a finite extension of $\mathbb{Q}_p$ with valuation ring $\mathcal{O}_F$. Let $G$ be a finite group and let...
5
[ -0.052734375, 0.0223388671875, -0.022705078125, -0.01611328125, 0.007598876953125, 0.12255859375, 0.0458984375, -0.018798828125, 0.006378173828125, -0.05322265625, 0.04931640625, 0.023193359375, -0.07080078125, 0.05322265625, 0.028076171875, 0.04833984375, -0.038818359375, -0.01190...
36,179
36179
Area of Triangles When Altitudes Are Given Date: 12/16/2002 at 02:39:51 From: Ridhi Kashyap Subject: Area of Triangles when altitudes are given Dear Dr. Math, I was wondering how to find the area of a triangle when the lengths of all three altitudes are given. An example: Find the area of a triangle with altitudes ...
5
[ 0.01226806640625, 0.1015625, -0.008544921875, -0.0274658203125, -0.034423828125, -0.024169921875, -0.0546875, 0.02587890625, -0.0634765625, 0.0238037109375, 0.01416015625, -0.1025390625, -0.01336669921875, 0.0196533203125, 0.07470703125, 0.10009765625, -0.03466796875, 0.03784179687...
36,180
36180
Ellipse Specification Using Vectors Trigonometric Splines For the purpose of the application I present here, think of splines as a means used to mathematically "connect the dots" with a smooth curve in some application where you are interested in defining a curve of arbitrary shape using movable points to control the ...
4
[ -0.09033203125, -0.05908203125, -0.06884765625, -0.07763671875, -0.04638671875, -0.022216796875, -0.0224609375, 0.031982421875, 0.044921875, -0.04296875, 0.06591796875, 0.045166015625, 0.01263427734375, -0.06689453125, -0.05908203125, 0.0498046875, -0.080078125, 0.017578125, 0.02...
36,181
36181
Linear Algebra Special Matrices Problem! September 1st 2008, 02:13 PM Skerven Linear Algebra Special Matrices Problem! What 2 by 2 matrix P projects the vector (x,y) onto the x axis to produce (x,0)? What matrix Q projects onto the y axis to produce (0,y)? If you multiply (5,7) by P and then multiply by ...
4
[ -0.046875, 0.00469970703125, -0.0673828125, -0.06689453125, 0.031494140625, 0.0211181640625, 0.025146484375, -0.039794921875, -0.0029449462890625, 0.057861328125, 0.05517578125, 0.009033203125, -0.00946044921875, 0.12353515625, -0.03515625, 0.09765625, -0.095703125, -0.014831542968...
36,182
36182
Solving for x in a matrix April 5th 2012, 05:43 AM #1 Member Joined Nov 2010 Posts 119 Solving for x in a matrix Solve the following equation for x | x a x b | | b x a x | = 0 | x b x a | | a x b x | (Determinant equals zero). I'm not sure how to do this and any help would be apprec...
4
[ -0.01318359375, -0.031494140625, -0.037353515625, -0.11181640625, -0.02392578125, 0.025390625, 0.045654296875, -0.06298828125, -0.0277099609375, -0.0181884765625, 0.08203125, -0.0286865234375, 0.0269775390625, 0.0283203125, 0.025634765625, 0.130859375, 0.036376953125, -0.0466308593...
36,183
36183
Basic Mortgage Math Question April 18th 2012, 09:58 AM #1 Basic Mortgage Math Question I was using a Mortgage calculator that displays the steps used to arrive at the answer, but I have a question on one of the basic steps. It reads You want the loan payment schedule for the following loan: □ Amount o...
5
[ 0.04736328125, 0.058837890625, -0.0233154296875, -0.043212890625, -0.051025390625, -0.0654296875, -0.0673828125, 0.040771484375, 0.07421875, 0.08935546875, 0.024658203125, -0.0103759765625, 0.01275634765625, -0.00201416015625, 0.03515625, 0.052734375, -0.109375, 0.00433349609375, ...
36,184
36184
Helly's number from biconvex functions up vote 1 down vote favorite Helly's Theorem states the following. Suppose $X_1,X_2,...,X_N$ are convex sets in $\mathbb{R}^d$, such that for any index-set $I$ with $|I| \leq h(d) := d+1$, we have $\bigcap_{i \in I} X_i \neq \ varnothing$. Then $\bigcap_{i=1}^N X_i \neq \varnothi...
5
[ 0.019775390625, -0.04833984375, -0.0224609375, -0.1279296875, 0.06689453125, -0.0003204345703125, 0.10986328125, -0.038330078125, 0.0166015625, -0.01239013671875, -0.037353515625, 0.048828125, 0.06494140625, -0.023193359375, -0.04833984375, 0.031982421875, 0.0194091796875, -0.05175...
36,185
36185
law of large number January 20th 2011, 08:16 PM #1 Newbie Joined May 2010 Posts 12 law of large number I have problem with the following question Let $\xi_1, \xi_2,...$ be independent and identically distributed random variables with $E|\xi_i|< \infty$. Show that $E\left(\xi_1|S_n,S_{n+1},...\r...
5
[ -0.037841796875, -0.08056640625, 0.0537109375, -0.0791015625, 0.1533203125, 0.0673828125, 0.03564453125, 0.01123046875, 0.043701171875, -0.00194549560546875, 0.03857421875, 0.064453125, 0.055908203125, -0.06982421875, -0.044921875, -0.0458984375, 0.0439453125, -0.02734375, -0.016...
36,186
36186
Ornstein-Uhlembeck coditioned to be positive up vote 2 down vote favorite 1 Let us consider $X$ to be an Ornstein–Uhlenbeck process, i.e. the solution of $\text{d}X_t = \text{d}W_t - X_t \text{d}t$. We define $Y$ by $$\mathbb{P}(Y\in \cdot):= \lim_{t\to+\infty}\mathbb{P}(X\in \cdot|\forall_{s\leq t}X_s \geq 0).$$ I ...
5
[ -0.10205078125, 0.016845703125, 0.0654296875, 0.0186767578125, 0.051513671875, 0.0279541015625, 0.030029296875, 0.0478515625, -0.015380859375, 0.0458984375, 0.02099609375, 0.0732421875, -0.00445556640625, 0.000408172607421875, 0.055419921875, 0.076171875, 0.11669921875, -0.08007812...
36,187
36187
A Novel Approach for Optimal Allocation of a Distributed Generator in a Radial Distribution Feeder for Loss Minimization and Tail End Node Voltage Improvement during Peak Load Maruthi Prasanna. H. A.^1, , Likith Kumar. M. V.^2, T. Ananthapadmanabha^3 ^1Assistant Engineer (Ele), Karnataka Power Transmission Corporatio...
4
[ -0.036376953125, 0.059814453125, -0.046142578125, -0.007476806640625, -0.04931640625, 0.033935546875, -0.040771484375, 0.07666015625, 0.0133056640625, 0.01611328125, -0.057861328125, 0.0181884765625, 0.054443359375, -0.04443359375, 0.048095703125, 0.053466796875, -0.011962890625, 0...
36,188
36188
An application of the residue theorem August 31st 2009, 12:58 AM #1 An application of the residue theorem I have a question about an application of the residue theorem to real definite integrals. In "COMPLEX ANALYSIS" by Ahlfors, there is the following statement: The integral $<br /> \int_{-\infty}^\...
5
[ -0.1103515625, 0.060791015625, -0.0274658203125, 0.07763671875, 0.031494140625, 0.037109375, 0.044921875, 0.076171875, 0.078125, -0.02294921875, 0.01214599609375, 0.0194091796875, 0.05126953125, 0.0028533935546875, -0.00390625, -0.054443359375, 0.0289306640625, 0.004669189453125, ...
36,189
36189
Help! Solving of Equations by the Elimination Method Please help me with this given equations. click on the attachment thnx These are all essentialy the same so I will show how to solve one of them and leave the rest for you. 1) 3x + 2y = -2 4x - 5y = 5 Choose one abd rearrange into the form y = ... Here I will use th...
4
[ -0.048095703125, -0.02880859375, 0.046875, 0.01470947265625, 0.042236328125, -0.06884765625, 0.00124359130859375, -0.060546875, -0.0269775390625, 0.0419921875, 0.076171875, 0.04443359375, 0.048095703125, 0.00848388671875, 0.0145263671875, 0.0927734375, -0.078125, -0.018798828125, ...
36,190
36190
How to determine coefficient in irreducible polynomial? HELP!! April 2nd 2009, 06:07 PM #1 How to determine coefficient in irreducible polynomial? HELP!! Here is my problem: Say if I have a irreducible polynomial for $GF(2^2)$ that is $x^2 + Nx + 1$, (N = elements of $GF(2)$) how do I determine the possible ...
5
[ 0.0218505859375, 0.034912109375, 0.003997802734375, 0.0263671875, 0.07275390625, 0.00933837890625, -0.0390625, 0.00299072265625, 0.0157470703125, -0.1083984375, 0.01519775390625, -0.0184326171875, -0.027099609375, -0.013427734375, -0.1142578125, -0.05322265625, -0.0279541015625, -0...
36,191
36191
Inverse of (1+x) ln(1+x) - x up vote 1 down vote favorite 2 Define g(x) = (1+x) ln(1+x) - x. One can check that g is strictly monotonically increasing for x>=0 by checking its derivative is ln(1+x). So g is invertible and its inverse is also strictly monotically increasing. Is there an explicit closed form for its in...
5
[ -0.06591796875, -0.10400390625, 0.1298828125, 0.037841796875, -0.0191650390625, -0.185546875, 0.036865234375, 0.020751953125, -0.003021240234375, 0.072265625, 0.0247802734375, 0.025146484375, 0.023681640625, -0.01904296875, -0.08251953125, 0.03955078125, 0.0301513671875, -0.0019454...
36,192
36192
latonic Platonic Solids and the Quaternions While you're pondering that, let me tell you another way to get some of the 4d regular polytopes. This method involves quaternions, which are a souped-up version of the complex numbers with three square roots of -1, called i, j, and k. A typical quaternion looks like this: ...
4
[ -0.034423828125, 0.0108642578125, 0.007080078125, -0.0322265625, -0.16796875, 0.0186767578125, -0.01397705078125, 0.0211181640625, 0.033203125, -0.002227783203125, 0.0458984375, -0.028564453125, -0.05224609375, 0.058837890625, -0.060546875, -0.04345703125, -0.0252685546875, 0.14550...
36,193
36193
analysis-bounded monotone sequence problem April 24th 2010, 04:40 AM #1 Newbie Joined Feb 2010 Posts 17 Prove that the sequence lim n-->infinity 1/n(1 + 1/2 + ...+ 1/n) = 0 is (i) monotone (ii) bounded (iii) find its limits How can i proceed to prove that it is monotone and bound...
5
[ -0.08056640625, 0.007720947265625, 0.08984375, 0.036865234375, 0.01275634765625, -0.0595703125, 0.002166748046875, 0.0693359375, 0.022705078125, -0.04248046875, -0.12109375, -0.044189453125, 0.005950927734375, 0.08251953125, -0.057861328125, 0.00653076171875, 0.09423828125, -0.0251...
36,194
36194
Math Help November 5th 2007, 11:22 PM #1 Newbie Joined Nov 2007 Posts 2 Passengers... Good morning to all 10 passengers that are considered distinguished, find itself in a bus and remain 3 attitudes (StA, StB, StC) A.With how many ways they can get off from the bus all the passengers if in eac...
4
[ 0.05810546875, -0.033447265625, 0.01141357421875, -0.09130859375, -0.01214599609375, 0.1650390625, 0.1337890625, 0.01055908203125, -0.0255126953125, 0.0145263671875, 0.05419921875, 0.0390625, 0.00677490234375, -0.03076171875, 0.00179290771484375, 0.0284423828125, 0.0238037109375, -...
36,195
36195
Ring Theory - Homomorphisms from Z to Z/30Z September 3rd 2012, 03:21 PM #1 Ring Theory - Homomorphisms from Z to Z/30Z I am reading Dummit and Foote on Ring Theory. Problem 4, Section 7.3 RIng Homomorphisms and Quotient Rings states: "Find all ring homomorphisms from $\mathbb{Z}$ to $\mathbb{Z} / 30 \m...
5
[ -0.06884765625, 0.046630859375, -0.015625, -0.002044677734375, 0.03857421875, -0.017578125, 0.058349609375, 0.0341796875, -0.06201171875, -0.0703125, 0.056396484375, -0.05419921875, 0.036865234375, -0.0223388671875, -0.040771484375, 0.03369140625, -0.033447265625, 0.058349609375, ...
36,196
36196
Minimum set cardinality for a given partially ordered set up vote 5 down vote favorite 1 Let S be a finite set of cardinality k. I consider subsets of S that I order by set inclusion. For any given k, this defines the partially ordered set S_k. To a given partially ordered set P, I associate the smallest k such that ...
4
[ 0.07568359375, 0.09765625, 0.00927734375, -0.026611328125, 0.042724609375, 0.06201171875, 0.029541015625, 0.041259765625, -0.00909423828125, 0.0247802734375, -0.08056640625, 0.0228271484375, 0.07763671875, 0.0113525390625, -0.0478515625, 0.0128173828125, 0.0732421875, 0.02282714843...
36,197
36197
Vectors, dot product and cross product. URGENT please Help May 14th 2008, 11:04 AM #1 Newbie Joined Mar 2008 Posts 4 Vectors, dot product and cross product. URGENT please Help 1) Vector v has magnitude 10 units, positive, and equal x and y components, and a z component of 4. Determine V. 2) vector u...
5
[ -0.040283203125, 0.0274658203125, -0.0615234375, -0.1298828125, 0.031005859375, 0.0250244140625, 0.0595703125, -0.042724609375, -0.049072265625, 0.03466796875, 0.010986328125, -0.0228271484375, -0.025634765625, 0.058837890625, -0.1044921875, 0.052001953125, -0.01556396484375, -0.01...
36,198
36198
Is every algebraic space the quotient of a scheme by a finite group? up vote 15 down vote favorite 10 In this MO question it is claimed that a catchphrase for "algebraic spaces" could be that they are "the result of looking at the orbit space of the action of a finite group on a scheme". Hence my question: Given...
4
[ -0.0888671875, -0.07861328125, -0.038330078125, 0.03271484375, -0.032470703125, -0.0130615234375, 0.03173828125, -0.08056640625, 0.07666015625, -0.0458984375, -0.002105712890625, -0.0038299560546875, -0.0130615234375, -0.016357421875, 0.005340576171875, -0.027099609375, -0.0036010742...
36,199
36199