content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
Can any1 help me with this example...?
November 1st 2007, 12:15 PM #1
Newbie
Joined
Nov 2007
Posts
21
Can any1 help me with this example...?
I ould really do with some help on this example i got in a revision booklet i have. Any input is great...thankyou.
product 1 needs 0.3 of A
0.1 of B
p... | 4 | [
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0.0213623046875,... | 15,600 | 15600 | |
Patent US3980874 - Binary to modulo M translation
BACKGROUND OF THE INVENTION
This invention relates to a method and apparatus for performing a modulo M translation on a large binary number and more particularly to a high speed method and reliable low-cost apparatus for
performing the translation.
One area requiring ... | 4 | [
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... | 15,601 | 15601 | |
Need some help with the method
May 1st 2009, 09:36 AM #1
Junior Member
Joined
May 2008
Posts
25
Need some help with the method
I've got an equation: 4x^3 - 24x^2 + 45 x - 23
A tangent is drawn at point P. (1,2)
dy/dx = 12x^2 - 48x +45
At f´(1) = 12 -48 + 45 = 9
2 = 9(1) +c
y = 9x... | 4 | [
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-... | 15,602 | 15602 | |
Compressible gas flow
In compressible flow, exact relation between pressure and specific volume is required, but it is not easily determined in each specific problem. Usually extremes are considered like adiabatic and
isothermal flow.
Calculator for pressure drop due to minor losses and friction for for known flow ra... | 4 | [
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0.06005859375,
... | 15,603 | 15603 | |
Australian Maths Competition
August 5th 2010, 09:31 PM #1
Newbie
Joined
Aug 2010
Posts
20
Australian Maths Competition
Hey,
I'm in Year 10, does anybody know the answers to the last 5 questions?
All I know:
The question that asks "how many numbers under 2010 have 3 factors" is 14.
Also... | 4 | [
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Oscillation frequency of circuit
1. The problem statement, all variables and given/known data
An L-C circuit containing an 83.0 [tex]\rm mH[/tex] inductor and a 1.50 [tex]\rm nF[/tex] capacitor oscillates with a maximum current of 0.800 A.
Calculate the oscillation frequency of the circuit.
2. Relevant equations
[t... | 4 | [
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0.021484... | 15,605 | 15605 | |
More limits of natural logs.
September 30th 2008, 06:54 PM #1
Newbie
Joined
Sep 2008
Posts
8
More limits of natural logs.
Why is the limit as x approaches +inf of (ln 2x)/(ln 3x) equal to 1? I thought that infinity/infinity was an indeterminate form? And I can't use L'Hopital's Rule yet either.
Tha... | 5 | [
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help! exam tomorrow
June 21st 2007, 03:21 PM
eric1044
help! exam tomorrow
1)Two hundred people attended a dance recital. Adults tickets were $10.00 and children were $7.50. If the total revenue was $1850.00 how many adults and how many children attended?
2) Forty metres of fencing are available to enclose ... | 4 | [
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... | 15,607 | 15607 | |
Conditional probability
November 11th 2009, 06:46 AM #1
Junior Member
Joined
Nov 2009
Posts
25
Conditional probability
10. The following data from a sample of 100 families show the record of college attendance by fathers and their oldest sons: in 22 families, both father and son attended college; in 31 f... | 4 | [
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Asteroid hits moon → moon hits Earth...possible?
Michael Mozina
Just out of curiosity, how did you calculate the time it would take to impact?
I used numerical integration techniques, specifically a velocity Verlet integrator.
Herein I place an upper bound on the time. For simplicity, assume the initial lunar orbi... | 5 | [
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Solving for x
November 4th 2009, 07:13 PM #1
Newbie
Joined
Nov 2008
Posts
17
Solving for x
Can someone help me solve for x? I tried many different ways, but I never got the answer so can someone show me the steps so I can understand what I did wrong?
1.
$y = 1 - \frac {1}{1-x}$
The answer sh... | 4 | [
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Basis of subspace (and combinations of them)
SoapyIllusion
1. The problem statement, all variables and given/known data
We are given the following subspaces
U := {x E R3: x1 + 2*x2 - x3 = 0}
and
V := {x E R3: x1 - 2*x2 - 2*x3 = 0}
And we need to find a basis for
(i) U
(ii) V
(iii) U n V (not an "n" but a symbol t... | 5 | [
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An Adaptive Estimation Scheme for Open-Circuit Voltage of Power Lithium-Ion Battery
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 481976, 6 pages
http://dx.doi.org/10.1155/2013/481976
Research Article
An Adaptive Estimation Scheme for Open-Circuit Voltage of Power Lithium-Ion Battery
School of Control... | 4 | [
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seating placement
October 5th 2008, 04:51 PM #1
Member
Joined
Oct 2007
Posts
89
seating placement
Hello, I thought this would of been easy but I am second guessing myself.
Frank, Tom, Jim and 6 other boys are randomly seated in a row. What
is the probability that neither Frank nor Tom sits next ... | 4 | [
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Given volume and SA, find lengths.
December 26th 2007, 09:15 AM #1
Newbie
Joined
Dec 2007
Posts
5
[Solved!]Given volume and SA, find lengths.
Given volume and surface area of a rectangular solid, and sides are in GP.?
The volume of a certain recangular solid is 64 and its total surface area is 384. I... | 4 | [
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Definition of determinant and connection to linear dependance of columns
July 12th 2011, 10:14 PM
Yair1978
Definition of determinant and connection to linear dependance of columns
Hi,
In my book on linear algebra (first year university) the author starts off explaining the concepts of determinants by focusi... | 4 | [
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Permutations / probability question
There are ${10 \choose 3}$ ways to pick the numbers to match. That is six cards. So we need four more cards. They can be of either color, but not the same number. Therefore, there are ${7 \choose 4}$
ways to pick the numbers to not match. But those four cards can be of either color, ... | 4 | [
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Power series question
December 28th 2011, 03:45 AM #1
Newbie
Joined
Dec 2011
Posts
14
Power series question
Let p be a polynomial of degree k>0. Prove that $\sum p(n)z^n$ has radius of convergence 1 and that there exists a polynomial q(z) of degree k such that $\sum_{n=0}^{\infty}p(n)z^n = q(z)(1-z)^{-
... | 4 | [
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Integrating the integral of ydx
March 8th 2007, 06:14 PM #1
Newbie
Joined
Mar 2007
Posts
2
Integrating the integral of ydx
Ok well I'm doing a problem involving throwing a ball up in the air and figuring out it's position function with consideration of air resistance.
The short in sweet is that I'm t... | 4 | [
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Probability
May 1st 2012, 04:54 AM #1
Junior Member
Joined
Jul 2008
Posts
33
Probability
There are 4 girls and 5 boys would like to go on school trip but there are onlyy 2 seats available.
a) calculate the probability that one girl and one boy will be chosen
ans P (BG)+ P(GB)=( 5/9 x 4/8 ) +( 4/... | 4 | [
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Normally distributed X implies logistic regression for Y
March 23rd 2011, 03:36 AM #1
Member
Joined
Oct 2008
Posts
206
Normally distributed X implies logistic regression for Y
Suppose the distribution of X for subjects having Y=1 is normal $N(\mu_1,\sigma)$, and suppose the distribution of X for subjects... | 4 | [
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Probably Overthinking It
This week's post contains solutions to
My Favorite Bayes's Theorem Problems
, and one new problem. If you missed
last week's post
, go back and read the problems before you read the solutions!
If you don't understand the title of this post,
brush up on your memes
.
1) The first one is a... | 5 | [
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Calculation of probability that two sets of outcomes are always disjoint
March 25th 2013, 03:53 AM #1
Newbie
Joined
Oct 2009
Posts
13
Calculation of probability that two sets of outcomes are always disjoint
Hello all,
I am a bioinformatician with a probability calculation problem. It is seemingly tr... | 5 | [
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Show That a Function is Contractive
May 4th 2007, 04:10 PM
theamazingjenny
Show That a Function is Contractive
Question:
Show that the following function is contractive on the indicated intervals. Determine the best values of [lamda] in Equation (2).
abs(x)^(2/3) on abs(x) < or = 1/3
Equation (2):
... | 5 | [
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Using the alternating series test for convergence ?
The alternating series test is given as:
$\sum^{\infty}_{r=1}(-1)^{r-1}b_r$ , where $b_n > 0$ , converges if $(b_n)$ is a monotone decreasing sequence with limit zero.
I have 3 problems,I am asked to investigate these for conditional or absolute converg... | 4 | [
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Log equation
November 5th 2007, 03:04 AM #1
Log equation
Hello
ln ( (e^x+1) / (x^3 + x^2) ) needs to be verified
So here's what I got:
= ln ( (e^x+1) / (x^3 + x^2) )
= ln (e^x+1) - ln (x^3 + x^2)
= (x+1) ln e - ln ((x^2(x+1))
-can't get past this point.
What do you mean by "veri... | 4 | [
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A Simple Model for Assessment of Anti-Toxin Antibodies
BioMed Research International
Volume 2013 (2013), Article ID 230906, 8 pages
http://dx.doi.org/10.1155/2013/230906
Research Article
A Simple Model for Assessment of Anti-Toxin Antibodies
HPP Division, Defence Science and Technology Organisation, 506 Lorimer Stre... | 4 | [
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Combinations - Math Genius
Answer :
The sum of all the numbers that can be formed with any given set of four different figures is always 6,666 multiplied by the sum of the four figures. Thus, 1, 2, 3, 4 add up 10, and ten times 6,666
is 66,660. Now, there are thirty-five different ways of selecting four figures from ... | 5 | [
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0.08300781... | 15,627 | 15627 | |
Math Help
October 15th 2011, 09:58 AM #1
Nail in Can
Hi All,
A similar question to the ladder one i posted earlier. Now that i have an idea from what i was shown earlier, i've tried to attempt it.
The Question says: A 20cm nail fits inside a cylindrical can. Find the maximum radius of 3 balls that will f... | 4 | [
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Dielectric and Energy
1. The problem statement, all variables and given/known data
Consider a horizontal square plate capacitor of area 1*1 m2, capacitance in vacuum 2 uF, which contains a dielectric material with dielectric constant K=5. The dielectric slides frictionlessly and is
attached via a massless string and a ... | 5 | [
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Solving differential equations: Help explain the answers please
December 22nd 2011, 06:30 AM #1
Newbie
Joined
Dec 2010
Posts
20
Solving differential equations: Help explain the answers please
I have done most of the questions, I am just struggling on a few parts. The question is:
a) Use the method o... | 5 | [
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Patent US6061672 - Fuzzy logic neural network modular architecture
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a modular architecture of a cellular network for integration on semiconductor circuits using large-scale integration technology. A cellular network includes a plurality of... | 4 | [
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what did i do wrong? Integral problem:
December 12th 2009, 06:07 PM
micro31337
what did i do wrong? Integral problem:
Am i doing this problem wrong?
Evaluate the integral
$<br /> \int (e^(2x)) / (e^x - 2)) dx$ <-- that is e^(2x)
i expanded the problem to:
$\int(e^x * e^x * (1/ (e^x - 2)) dx$
... | 5 | [
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Number stuff (urgent)
August 10th 2009, 01:29 AM #1
Newbie
Joined
Jun 2009
Posts
9
digits 2, 3, 4, 5 and 7 are each used once to compose a 5-digit number abcde such that 4 divides a 3 digit number abc, 5 divides a 3 digit number BCD and 3 divides a 3 digit number cde. Find the
5=digit number abcde.
... | 4 | [
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... | 15,633 | 15633 | |
Differentiating this Expression
July 24th 2011, 12:32 PM
YoungMarbleGiant
Differentiating this Expression
Can anyone help me with this? The question asks to differentiate the following...
(x-5)^8 * (x+3)^6
The way I attempted it was to try using the product rule, but I don't get the same answer as stat... | 4 | [
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Showing existence of an operator
December 26th 2009, 03:08 AM #1
Showing existence of an operator
I've been given the following question:
Let $(\mathcal{H},(,))$ be a real Hilbert space with an orthonormal basis $\left\{e_n\right\}_{n=1}^{\infty}$. Let $F:[0,1]\to \mathcal{H}$ be continuous. Show that there ... | 5 | [
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-0.000530242919921... | 15,635 | 15635 | |
trig derivative help...
February 21st 2010, 11:42 AM #1
Junior Member
Joined
Jan 2010
Posts
62
trig derivative help...
h(x) = sin2xcos2x
h'(x) = -4cos2xsin2x <--- doubt this is correct
--------------------
f(x) = cotx/sinx (unsure on how to do this....)
-thx
For the first one tr... | 5 | [
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Ordering proof?
June 24th 2010, 05:42 AM #1
Senior Member
Joined
Jul 2006
Posts
364
Ordering proof?
Given unit vectors $q$ and $d_i$, i=1, 2, 3, ...,
$q, d_i \in \mathbb{R}^n<br />$
and we compute $q\cdot d_i$ and the L2 distance between them, $|q-d_i|^2=\sum_{j=1}^n (q_i-d_{ij})^2$, and we were ... | 4 | [
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Integration by substitution
June 17th 2009, 12:35 PM #1
Junior Member
Joined
Jan 2009
Posts
69
Integration by substitution
I think that Integration by substitution is the appropriate method to use for the following function.
$\displaystyle\int\dfrac{2\sec x}{2+\tan x}$
I can simplify it to
... | 5 | [
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How to pick motors for linear motion
The easiest way to design a linear-motion system is to add components one by one. Then, step-by-step calculations relate input to power dissipated moving a load in a specific amount of time.
Motors must accelerate loads while overcoming system friction and gravity without overheati... | 5 | [
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Pulse splitting in the anomalous group-velocity-dispersion regime
« journal navigation
Pulse splitting in the anomalous group-velocity-dispersion regime
Optics Express, Vol. 19, Issue 10, pp. 9309-9314 (2011)
http://dx.doi.org/10.1364/OE.19.009309
Abstract
We investigate experimentally the role that the initial te... | 4 | [
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Projectile motion - maximum height
June 5th 2009, 02:52 PM #1
Junior Member
Joined
May 2009
From
Barrie, Ontario
Posts
35
Projectile motion - maximum height
If a projectile is fired upward from the surface of the moon with an initial velocity of 40 m/s, its height, in metres, after t seconds is given... | 4 | [
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0.0458984375... | 15,641 | 15641 | |
constructing basis
May 10th 2011, 08:25 AM #1
Junior Member
Joined
Aug 2010
Posts
31
constructing basis
Define a real linear transformation
L1 : R4 \to R2 by
L
1(x1, x2, x3, x4) = (3x1 + x2 + 2x3 − x4, 2x1 + 4x2 + 5x3 − x4)
and let U1 denote the kernel of L1. Define a real line... | 5 | [
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[SOLVED] Two questions about Euler
April 16th 2009, 07:59 PM #1
Newbie
Joined
Apr 2009
Posts
4
[SOLVED] Two questions about Euler
1. find $3^{51204}$( $\bmod 74800$)
i got $\phi(74800)$= 29760 & (3,74800) =1
so, $3^{\phi(74800)}$$\equiv 1$ ( $\bmod 74800$)
but what shall i do next? 51204-297... | 5 | [
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search results
Expand all Collapse all Results 1 - 1 of 1
1. CMB 2010 (vol 53 pp. 667)
On the Endomorphism Rings of Local Cohomology Modules
Let $R$ be a commutative Noetherian ring and $\mathfrak{a}$ a proper ideal of $R$. We show that if $n:=\operatorname{grade}_R\mathfrak{a}$, then $\operatorname{End}_R(H... | 4 | [
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... | 15,644 | 15644 | |
Pulley Problem: Find acceleration of block
Register to reply
by sona1177
Tags: acceleration, block, pulley
P: 173 1. The problem statement, all variables and given/known data
A 1.5 kg block and a 2.5 k... | 4 | [
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Patent US6988104 - System and method for allocating data in a hierarchical organization of data
TECHNICAL FIELD OF THE INVENTION
This invention relates to the field of data allocation, and more particularly to a system and method for allocating data in a hierarchical organization of data.
BACKGROUND OF THE INVENTION
... | 4 | [
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[SOLVED] Matrix problem, a bit clueless
September 14th 2008, 02:13 PM #1
[SOLVED] Matrix problem, a bit clueless
Find the reduced row equivalent to $A$, $R$ where $A=\left( \begin{array}{ccc} 3 & -1 & 2 \\ 2 & 1 & 2 \\ 1 & 3 & 2 \end{array} \right)$. I won't show my calculus but I found $R$ to be $\left( \
be... | 5 | [
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... | 15,647 | 15647 | |
Gradient of a curve
May 10th 2011, 08:47 PM
Tim82
Gradient of a curve
Q:
The gradient of a curve with equation y=f(x) is given by f1 (x) = x + sin2x.
If f(0) = 1, find f(\pi )
Any help would be appreciated (Happy)
May 10th 2011, 09:00 PM
Prove It
If you're finding f(pi), just substitute x = ... | 5 | [
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Question about epsilons that occurs in calculating beta functions in QFTs w dim reg
In deriving the beta function of, say, QED using dimensional regularization we get the relation (up to 1 loop)
[tex]\beta[e] = - \frac{\epsilon}{2} e - e \frac{d ln[Z_{e}]}{d ln[\mu]} \quad (1)[/tex]
and
[tex]Z_{e} = 1 + \frac{e^{2} ... | 5 | [
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Finding the internal angles of a polygon
August 15th 2010, 12:59 AM #1
Newbie
Joined
Aug 2010
Posts
2
Finding the internal angles of a polygon
Hi there,
This might seem a simple question, but I suck at maths. I need to cut some ply to fill a gap behind my boat kitchen and I have measured the lengths... | 4 | [
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Second Order DE: Nonlinear Homogeneous
Here, for example, since sin(x)= x- (1/6)x^3+ ..., a first approximation would be to replace sin(x) by x: mx"+ cx'- kx= 0.
A slightly more sophisticated method is "quadrature": Let u= x' so that x"= u'. By the chain rule, u'= (du/dx)(dx/dt)= u u' so the equation becomes u u'+ cu-... | 4 | [
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Effects of astigmatism on spectra, coherence and polarization of stochastic electromagnetic beams passing through an astigmatic optical system
« journal navigation
Effects of astigmatism on spectra, coherence and polarization of stochastic electromagnetic beams passing through an astigmatic optical system
Optics Expr... | 4 | [
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Posts from July 2011 on Hydrobates
In a previous post I discussed a paper of Lev Bar-Or about the dynamics of the interactions between T cells and macrophages via the cytokines they produce. The model of that paper is a
four-dimensional dynamical system with eighteen parameters. In that post I also discussed a paper of... | 4 | [
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-0.013366699... | 15,653 | 15653 | |
Minimum total area
February 21st 2009, 12:52 PM #1
Newbie
Joined
Feb 2009
Posts
2
Minimum total area
A garden is being designed to have a planted area of 12m^2. Around the edge there will be a path, 1m wide on two opposite sides and 1.5m wide on the other two opposite sides. Find the dimentions
of th... | 4 | [
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-0.10742187... | 15,654 | 15654 | |
need help on solving zero equations
June 7th 2009, 03:38 PM #1
Newbie
Joined
Apr 2009
Posts
8
I'm stuck:
a. 4(x squared) + 12x + 3 = 0
b. 2x + 1 = 5 divided by (x + 2)
c. [(x + 1) divided by x ] - [x divided by (x + 1)] = 0
Here ya go
$4x^2+12x+3=0$
using the quadratic fo... | 4 | [
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0.06591796875,
-0.07080078125,
0.08544921875,
-0.0255126953125,
... | 15,655 | 15655 | |
the encyclopedic entry of clp(sigma*)
In
mathematics
, a
σ-algebra
(or
sigma-algebra
) (
sigma
is a Greek letter, upper case Σ, lower case σ) over a
set X
is a nonempty collection Σ of
subsets
of
X
(including
X
itself) that is
closed
under
complementation
and
countable unions
of its members. It is... | 4 | [
-0.039306640625,
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0.0162353515625,
0.0074462890625... | 15,656 | 15656 | |
Wolfram Demonstrations Project
n-Sectors of the Angles of a Triangle
The -sectors of an angle are the lines that divide the angle into equal parts. In a triangle, the bisectors are collinear, the trisectors lead to Morley's theorem, …. More modestly, this
Demonstration provides a way to count the intersection points o... | 4 | [
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-... | 15,657 | 15657 | |
Euler Phi-Function
May 12th 2009, 02:54 AM #1
Newbie
Joined
May 2009
Posts
2
Euler Phi-Function
Can someone please help me with this proof.
Find all n such that phi(n) = n/3.
Any help is much appreciated.
To start with, note that, since $\phi(n)$ is either 1 or an even number, n must be even... | 5 | [
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0.0148315429687... | 15,658 | 15658 | |
Sigma algebra, open and closed set.
October 18th 2010, 09:40 AM #1
Newbie
Joined
Oct 2010
Posts
10
Sigma algebra, open and closed set.
Hi,
I have a lot of problems with proving that M is algebra.
$M=\{ F \cap G: G,F \subset R$ and F is open set and G is closed set $\}$
Any clues?
Eh...I... | 4 | [
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Trig Help Please
July 16th 2007, 11:02 AM #1
Trig Help Please
This is something I've never really gotten the hang of...
If tan 20 = t ; how could the following be expressed in terms of t?
a) tan 70
b) tan 40
c) tan 200
d) sec 20
My answers:
a) $\frac{1}{t}$
b) $?$
c) $t$
... | 4 | [
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Patent US6990625 - Burst error pattern generation method, and burst and byte error detection correction apparatus
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a pattern generation method of burst errors existing in a received information, and a detection and correction appara... | 4 | [
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-0.00130462646484375,... | 15,661 | 15661 | |
Patent US6549907 - Multi-dimensional database and data cube compression for aggregate query support on numeric dimensions
FIELD OF THE INVENTION
The present invention concerns the compression of large database and their corresponding OLAP data cubes and provides an improved method and apparatus for efficiently and app... | 4 | [
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0.05712890... | 15,662 | 15662 | |
Cardinal exponentiation
August 23rd 2009, 08:52 AM #1
Member
Joined
Jul 2009
Posts
168
Cardinal exponentiation
I need to prove the following rules on cardinals:
Let κ, μ, ν be cardinal numbers. Prove:
1. κ^(μ + ν) = κ^μ·κ^ν.
2. κ^μ·ν = (κ^μ)^ν.
--
How do I start proving such thin... | 5 | [
0.06640625,
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0.03051757... | 15,663 | 15663 | |
Ornstein-Uhlenbeck equation
September 30th 2009, 12:40 PM #1
Ornstein-Uhlenbeck equation
I find out the solution of Ornstein-Uhlenbeck equation $\ dX_{t}=\mu X_{t}dt+\sigma bB_{t}\$ is
$\ X_{t}=X_{0}e^{\mu t}+\sigma \int_{0}^{t}e^{\mu \left ( t-s \right )}dB_{s}\$
My problem is how to find $\ E\left [ X_... | 5 | [
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0.0224609375,
0.07958984375,
0.01416015625,
0.021... | 15,664 | 15664 | |
GMAT Coordinate Geometry
• GMAT Prep (USA)
•
• GMAT Prep (International)
•
• Favorite GMAT Articles
□ 800score GMAT Course Reviews
□ GMAT Course Comparision
□ GMAT Essay Tips & Grading from 800score
•
• Free GMAT Prep
□ Free GMAT CAT tes... | 4 | [
0.02099609375,
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0.00451660... | 15,665 | 15665 | |
first order differential equation
January 26th 2007, 06:58 AM #1
Member
Joined
Oct 2006
Posts
81
first order differential equation
Solve for dy/dx+y/x=1/x
I'd like to see the correct way to solve it. I did it a ridiculous way and ended up with the answer, but I don't want to spend so much time next ... | 5 | [
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0.0028076171875,... | 15,666 | 15666 | |
Determine distribution, Prove Laplace Transform
August 14th 2009, 04:36 AM
woody198403
Determine distribution, Prove Laplace Transform
Consider a game in which a fair coin is tossed indefinitely. Every time heads appears you move 1 metre to the right, and if tails you stay where you are. You start at position 0.... | 5 | [
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0.0167236328125... | 15,667 | 15667 | |
seperable equation
December 12th 2010, 01:43 PM #1
Junior Member
Joined
Mar 2009
Posts
65
seperable equation
I reviewing for my final and stuck on this question.
dy/dx=y^2/x^2
here is my work
dy/y^2=dx/x^2, integrading both sides i get
-1/y=-1/x+c, i then multiple each side by negativ... | 5 | [
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-0.... | 15,668 | 15668 | |
Pre-Image / Image proof
March 8th 2012, 07:26 PM
monster
Pre-Image / Image proof
I'm new to topology and have a pretty basic proof to perform but haven't had much experience with proofs and could use some help,
Question asks, to prove that if f: A -> B and X is a subset of A
prove that X is a subset of... | 4 | [
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Permutations Matrices Question
September 23rd 2010, 04:56 PM
Aquameatwad
Permutations Matrices Question
This is a homework problem i had. Help!
Explain why the dot product of x and y equals the dot product of Px and Py.
Then From (Px)^T(Py)=x^Ty deduce that P^TP=I for any permutation. With x=(1,2,3) and... | 5 | [
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... | 15,670 | 15670 | |
[OT] Function to do x**y for |y|<1 w/o ** operator.
swampyankee has asked for the wisdom of the Perl Monks concerning the following question:
In another forum (one that's science, not software, oriented), there was a poster asking for programming advice. He's trying to port some code to a PLC, the development environm... | 5 | [
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-0.03857421875,
... | 15,671 | 15671 | |
nth root of a complex number
November 6th 2010, 08:38 AM #1
Newbie
Joined
Oct 2010
Posts
19
nth root of a complex number
Ok so basically I'm supposed to understand complex numbers (so that we can use them for eigenvalues and eigenvectors), but then someone dropped the ball and we got almost no teaching o... | 5 | [
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0.0849609375,
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-0.060791015625,
-0.0055236816... | 15,672 | 15672 | |
Patent US6181751 - Multi-stage detection system in digital demodulator
BACKGROUND OF THE INVENTION
The present invention relates to a multi-stage detection system in a digital demodulator for demodulating a received signal by differential detection.
Digital demodulators are widely used in the telecommunication field.... | 4 | [
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The transit light curve
Introduction
The transit light curve gives an astronomer a wealth of information about the transiting planet as well as the star. It is only for transiting exoplanets that astronomers have been able to get direct
estimates of the exoplanet mass and radius. With these parameters at hand astronom... | 4 | [
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... | 15,674 | 15674 | |
find a formula, 2 variables
September 26th 2009, 07:50 PM #1
Senior Member
Joined
Jun 2009
Posts
251
find a formula, 2 variables [SOLVED]
There's a box with 16 cubic meter volume. Height z, depth y, width x. The sides cost $10/sq meter and top and bottom cost $20/sq meter. Write an equation for the cost ... | 4 | [
0.0216064453125,
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0.1513671875,
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0.0625,
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0.100097656... | 15,675 | 15675 | |
A new point of view on Cantor's diagonalization arguments
In standard Math The opposite of any given diagonal has to be added to the list, therefore no list of magnitude aleph0 can be in a bijection with R members which means that |R| is uncountable.
But look at this:
...0101 and ...1010 are in the list, for example:... | 4 | [
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0.0625,... | 15,676 | 15676 | |
Patent US3859515 - Method and apparatus for signal spectrum analysis by hadamard transform
uuucu vacuum I aeclu L Radcliffe, Jr.
[ Jan. 7, 1975 METHOD AND APPARATUS FOR SIGNAL SPECTRUM ANALYSIS BY HADAMARD TRANSFORM [75] Inventor: Arthur J. Radcliffe, Jr., Ann Arbor,
Mich.
[73] Assignee: Burroughs Corporation, Detro... | 4 | [
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0.00750732421875,
-0.06396484375,
0.045166015625,
0.0081787109375,
-0.... | 15,677 | 15677 | |
Hermite polynomials
I need some help if possible with the following problems.The statements are long so please bare with me.
This is concerned with a system of polynomials, the Hermite polynomials,
which arise in various applications, in particular in the analysis of the normal distri-
bution in probabi... | 4 | [
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0.01507568359375,
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0.09814453125,
-0.06640625,
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-0.08251953125,
-0.043212890625,
-0.045654296875,
-0.0498046875,
-0.0284423828... | 15,678 | 15678 | |
Math Help
January 9th 2009, 03:44 AM #1
Prove:
Prove the following inequalities.
1) $\frac{x^2}{y^2} + \frac{y^2}{z^2} + \frac{z^2}{x^2} \ge \frac{x}{z} + \frac{y}{x} + \frac{z}{y}$
2) $\frac{x^2}{y^2} + \frac{y^2}{z^2} + \frac{z^2}{x^2} \ge \frac{x}{y} + \frac{y}{z} + \frac{z}{x}$
1)
... | 5 | [
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0.0157470703125,
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0.0732421875,
0.043701171875,
0.001029... | 15,679 | 15679 | |
integration by substitution xe^x^2
October 5th 2008, 09:44 PM
Craka
integration by substitution xe^x^2
Question is to calculate the integral $\int\limits_0^2 {xe^{x^2 } dx} =$
This is what I have done, however looks to be incorrect.
I let $u = e^{x^2 }$
and so $\begin{array}{l}<br /> \frac{{du}}{{... | 5 | [
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0.0250244140625,
0.006378173828125,
0.02978515625,
... | 15,680 | 15680 | |
Proving countability from surjectivity
September 20th 2007, 06:32 PM #1
Newbie
Joined
Sep 2007
Posts
2
Proving countability from surjectivity
let f: S --> T be a surjective function
if S is countable, prove that T is countable
I see that f(S) = T, but and I know that there is a surjection from t... | 5 | [
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0.043212890... | 15,681 | 15681 | |
Ideal norms in a pid
May 18th 2006, 12:47 PM
DMT
Ideal norms in a pid
Is it true that if two ideals in a pid have the same norm then they are in fact the same ideal (even if being generated by different elements)?
For example, I have a problem asking me to find all ideal in a certain integer ring with a giv... | 5 | [
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-0.002532958984375,
-0.02490234375,
-0.03417... | 15,682 | 15682 | |
Proving y^2=-4x
May 27th 2010, 04:48 AM
chaosier
Proving y^2=-4x
I am given equations with coefficients related by a common ratio, thus a geometric sequence, such as
2x+4y=8
3x+12y=48
I plotted numerous lines which obey this geometric pattern and discovered that there is a curve which through trial... | 5 | [
-0.0264892578125,
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-0.0341796875,
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0.140625,
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Intgration again - Trig Sub
October 31st 2007, 01:48 PM #1
Newbie
Joined
Oct 2007
Posts
10
Intgration again - Trig Sub
solve:
$\int \frac{dx}{x^2 (\sqrt{x^2+1})}$
I use these trig subs:
$x=tan\theta$
$dx=sec^2 \theta \\d\theta$
after substituting and simplifying I end up here:
... | 5 | [
0.0135498046875,
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0.043212890625,
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0.035888671875,
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0.052490234375,
0.00765991210... | 15,684 | 15684 | |
User:Gwern/kenn
From HaskellWiki
< User:Gwern
(Difference between revisions)
Gwern (Talk | contribs) Gwern (Talk | contribs)
(→First-Order Logic: again remove the \\)
← Older edit ... | 4 | [
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[SOLVED] Quadrilaterals
December 4th 2005, 03:19 PM
chana
[SOLVED] Quadrilaterals
in the parallelogram DEFG, the measures of angle D and angle E are in the ratio of 1:4. The measure of angle F in degrees is
December 4th 2005, 08:39 PM
CaptainBlack
Quote:
Originally Posted by chana
in the parall... | 4 | [
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0.... | 15,686 | 15686 | |
Two Infinite Series Problems
March 25th 2010, 05:10 PM #1
Junior Member
Joined
Jan 2010
Posts
28
Two Infinite Series Problems
I have two problems that I can't seem to get.
Problem 1. Use the ratio test to determine whether the series converges or diverges. Explain how the test permits you to draw yo... | 5 | [
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check solution - langrange multipliers
October 21st 2008, 02:25 PM
dopi
check solution - langrange multipliers
i need find an expression in terms of v for the minimum value of (x^t)x subject to the constraint (v^t)x = k
v is a fixed vector in R^n
k is a real constant
I need to use langrange multitp... | 5 | [
0.03076171875,
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0.0068969726... | 15,688 | 15688 | |
Machine Learning and Its Applications to Biology
Citation: Tarca AL, Carey VJ, Chen X-w, Romero R, Drăghici S (2007) Machine Learning and Its Applications to Biology. PLoS Comput Biol 3(6): e116. doi:10.1371/journal.pcbi.0030116
Editor: Fran Lewitter, Whitehead Institute, United States of America
Published: June 29, ... | 4 | [
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... | 15,689 | 15689 | |
easy stuff!
January 30th 2007, 09:52 PM
Nick744
easy stuff!
Hello!
This is my final year in high-school so I think I may find this forum handy, get ready to be annoyed at me due to uber use of the forums. :p
I have a question to begin.
A travel agency calculates the expense E of organising a holid... | 4 | [
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... | 15,690 | 15690 | |
Augmented matrix
January 30th 2007, 11:31 PM #1
Member
Joined
Jun 2006
Posts
165
The following matrix is obtained from a augmented matrix, system of equations.
1 0 3 20
0 1 2 -2
0 0 1 4 my answer is 20,-2,4 is this right, thanks for checking my answer.
You have:
x_1 + 3x_3 = 20
x... | 4 | [
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0.036865234375,
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-0.05078125,... | 15,691 | 15691 | |
Circular Motion (finding speed)
1. The problem statement, all variables and given/known data
A ball of mass 0.23 kg is attached securely to a string, then whirled at a constant speed in a vertical radius of 0.75 m. Calculate the minimum speed of the ball at the top of the path if it is to
follow a complete circle.
2.... | 4 | [
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... | 15,692 | 15692 | |
Experimental Investigation and Passive Flow Control of a Cavitating Centrifugal Pump
International Journal of Rotating Machinery
Volume 2012 (2012), Article ID 248082, 8 pages
http://dx.doi.org/10.1155/2012/248082
Research Article
Experimental Investigation and Passive Flow Control of a Cavitating Centrifugal Pump
F... | 4 | [
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0.06... | 15,693 | 15693 | |
Mean Squared Error
GeneXproTools 4.0 implements the Mean Squared Error (MSE) fitness function both with and without parsimony pressure. The version with parsimony pressure puts a little pressure on the size of the
evolving solutions, allowing the discovery of more compact models.
The MSE fitness function of GeneXproTo... | 4 | [
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0.0400390625,
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-0.020263671875,
-0.025756835... | 15,694 | 15694 | |
Re: Re: Binomial Expansion
in reply to Re: Binomial Expansion
... | 4 | [
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User:Allison K. Alix/Notebook/Thesis Research/2013/10/29
From OpenWetWare
(Difference between revisions)
(→Calculations) (→Calculations)
← Previous diff Next diff →
Line 70: Line 70:
= 1.42x10<sup>-15</sup>L = 1.42x10<sup>-15</sup>L
+
... | 5 | [
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The Mechanical Bidomain Model: A Review
ISRN Tissue Engineering
Volume 2013 (2013), Article ID 863689, 8 pages
http://dx.doi.org/10.1155/2013/863689
Review Article
The Mechanical Bidomain Model: A Review
Department of Physics, Oakland University, Rochester, MI 48309, USA
Received 12 September 2012; Accepted 18 Octo... | 4 | [
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-0.12... | 15,697 | 15697 | |
Poisson's equation
April 6th 2009, 05:28 PM
gsds
Poisson's equation
where initial conditions are w(x,0) = w(x,b) = w(0,y) = w(a,y) = 0
poisson's equation is d2w/dx2+d2w/dy2 = f(x,y)
if we assume a 1D eigenfunction expansion:
w(x,y) = Sum(a_n(y) * sin(n*pi*x/a)
Obtain the ode and BCs for each a... | 4 | [
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-0.08984375... | 15,698 | 15698 | |
cyclical system of equations
January 26th 2013, 06:38 AM
darence
cyclical system of equations
I need help about this:
I a,b,c are real numbers such that $(b-1)^2-4ac<0$ , proof that system
$ax^2+bx+c=y\\ ay^2+by+c=z \\ az^2+bz+c=x$
don't have any solution in set of real numbers.
January 26th 2013... | 4 | [
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