content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
Physics Forums - 1st order non homogenous DE problem solving
Somefantastik Aug24-08 03:06 PM
1st order non homogenous DE problem solving
In my notes, the prof wrote x' = x + sin(t), x(0) = x[0]
He did not go through the solution, only wrote that the solution is
x(t,x[0]) = x[0]e^t + e^t/2 - 1/2(sin(t) + cos(t)... | 5 | [
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Determine if a matric is diagonalizable and diagonlize it
Okay, you have eigenvector [1, -1] corresponding to eigenvalue -3 and eigenvector [4, 1] corresponding to eigevalue 1. Those are correct.
You then put them together to form matrix "P" (you have it labeled [itex]\vec{V}[/itex] which is incorrect- this is a matri... | 5 | [
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How do you calculate the area under hyperbola?is this correct? what do I do next?
January 7th 2010, 09:34 AM #1
Newbie
How do you calculate the area under hyperbola?is this correct? what do I do next?
Solve it parametrically if we know that the parametric representation of the right side of a hyperbola $\frac{x^... | 4 | [
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A Linear Homogeneous Partial Differential Equation with Entire Solutions Represented by Laguerre Polynomials
Abstract and Applied Analysis
Volume 2012 (2012), Article ID 609862, 10 pages
http://dx.doi.org/10.1155/2012/609862
Research Article
A Linear Homogeneous Partial Differential Equation with Entire Solutions Rep... | 5 | [
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Please help me with multiple comparisons - (stats)
Please help me with multiple comparisons - (stats)
This is an "analysis of one way classified data".
In design of experiments you see it as CRD (completely randomized design).
The analysis is very straight forward.
Xi = ith observation
Ti= i th row total, G = sum o... | 4 | [
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how to get a number without a remainder
September 30th 2009, 06:46 AM #1
Newbie
Joined
Aug 2009
Posts
17
how to get a number without a remainder
Let A and B be some number, integer or decimal.
I want to figure out the lowest possible integer X that will yield another integer Y in the following formu... | 4 | [
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-0.... | 20,605 | 20605 | |
Berinde-Type Generalized Contractions on Partial Metric Spaces
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 312479, 10 pages
http://dx.doi.org/10.1155/2013/312479
Research Article
Berinde-Type Generalized Contractions on Partial Metric Spaces
^1Department of Mathematics, College of Education of Jubai... | 5 | [
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... | 20,606 | 20606 | |
[SOLVED] Proof of divisibility by Induction
November 14th 2007, 04:26 PM
R.Laramee
[SOLVED] Proof of divisibility by Induction
I am having difficulty with induction in several areas, however one question at a time.
Ex. if 6 divides n(n^2 + 5) for all n >=1 prove for n+1.
What I have so far is (k+1)((k+1... | 4 | [
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... | 20,607 | 20607 | |
Elevator work, power [Physics]
April 19th 2009, 04:52 PM #1
Newbie
Joined
Sep 2008
Posts
10
Elevator work, power [Physics]
I threw this one in the physics help forum, but nobody seems to go there so i figured i would try the other topics forum ^^
A 650-kg elevator starts from rest. It moves upward f... | 4 | [
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finding the distance between a vector and image
December 9th 2010, 12:23 PM
giygaskeptpraying
finding the distance between a vector and image
I have a vector b
[1
1
1
0]
and a matrix A
[1 0 1
2 -1 1
-1 2 1
0 -1 -1]
it says
1. the sum of the first two columns is equal ... | 4 | [
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Relationship between the graph lines/points of a Function, its Derivative, & Integral
February 27th 2011, 06:45 PM #1
Newbie
Joined
Jan 2011
Posts
10
Relationship between the graph lines/points of a Function, its Derivative, & Integral
I was using this applet, looking at a line, it's derivative, and it's... | 4 | [
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Patent US4754391 - Method of determining PID parameters and an automatic tuning controller using the method
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to PID controllers. More specifically, the present invention is directed to a method of determining PID parameters for a PID f... | 4 | [
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Proposition 30
To find two rational straight lines commensurable in square only such that the square on the greater is greater than the square on the less by the square on a straight line incommensurable in length
with the greater.
Set out a rational straight line AB, and two square numbers CE and ED such that their ... | 5 | [
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Patent US5404574 - Apparatus and method for non-regular channel assignment in wireless communication networks
This application is a continuation-in-part of application Ser. No. 07/888,742, filed on May 22, 1992, now abandoned.
FIELD OF THE INVENTION
This invention relates to wireless/cellular radiotelephone systems a... | 4 | [
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Matrix associated to a linear map
September 11th 2009, 12:14 AM #1
Junior Member
Joined
Aug 2009
Posts
62
Matrix associated to a linear map
R^3 = L(direct sum)W,with dim(L)=1.Suppose T:R^3--->R^3 is a linear map.T(L)subset of L and T(W)subset of W.
Find a basis B of R^3 such that m(T;B) is a 3*3 matr... | 4 | [
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Numerical Analysis: Fixed Point Iteration
Consider the fixed point iteration formula:
*x_(n+1) = (2/3)[(x_n)^3 - 1] - 3(x_n)^2 + 4x_n = g(x)
*Note: "_" precedes a subscript and "^" precedes a superscript
(a) Find an interval in which every starting point x_0 will definitely converge to alpha = 1.
(b) Show that the o... | 4 | [
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0.012145996... | 20,615 | 20615 | |
Physics Forums - View Single Post - Statistics: Show that the sum of two independent Cauchy random variables is Cauchy.
Given the fact that X and Y are independent Cauchy random variables, I want to show that Z = X+Y is also a Cauchy random variable.
I am given that X and Y are independent and identically distributed... | 4 | [
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Help with a derivation!
1. October 21st 2011, 05:28 PM #1
2. October 21st 2011, 06:04 PM #2
Re: Help with a derivation!
It would help greatly if we had the context for this problem. It looks to me like some sort of least-squares fit (maybe log-likelihood?). Please define every single variable I see. Tha... | 5 | [
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0... | 20,617 | 20617 | |
Prove by induction
November 21st 2012, 08:04 AM #1
Newbie
Joined
Oct 2012
From
Earth
Posts
9
Prove by induction
I'm stuck on this exercise, I know I'm getting close, but I just can't see it
Prove by induction that $\sum_{i=0}^n i2^{i - 1} = (n -1)2^n + 1$.
Basically this boils down to showi... | 4 | [
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An NTCP Analysis of Urethral Complications from Low Doserate Mono- and
Prostate Cancer
Volume 2011 (2011), Article ID 128360, 9 pages
http://dx.doi.org/10.1155/2011/128360
Research Article
An NTCP Analysis of Urethral Complications from Low Doserate Mono- and Bi-Radionuclide Brachytherapy
^1NAmur Research Institute ... | 4 | [
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-0.0012... | 20,619 | 20619 | |
Matrix that has square root
November 28th 2011, 11:27 AM #1
Junior Member
Joined
Apr 2010
Posts
58
Matrix that has square root
A matrix A belonging to $M_n$ is a square root of B belonging to $M_n$ if $A^2$=B. Show that every diagonalizable matrix in $M_n$ has a square root.
I know that a diagonal m... | 5 | [
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0.0390625,
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Hard complex analysis question help Please!
April 14th 2009, 08:02 PM #1
Newbie
Joined
Apr 2009
Posts
1
Hard complex analysis question help Please!
Hi,
I totally have no idea how to do this question which involves residue...
Intergral from negative infinity to positive infinity of
((Sinx)^2... | 5 | [
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Higher-Harmonic Generation Analysis in Complex Waveguides via a Nonlinear Semianalytical Finite Element Algorithm
Mathematical Problems in Engineering
Volume 2012 (2012), Article ID 365630, 16 pages
http://dx.doi.org/10.1155/2012/365630
Research Article
Higher-Harmonic Generation Analysis in Complex Waveguides via a ... | 4 | [
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Avg. Value
August 2nd 2009, 11:20 AM #1
Junior Member
Joined
Jul 2009
Posts
67
Avg. Value
$\int_{pi/4}^{pi/2} sinx dx$
I tried finding the average value of the function and came out with the answer .5554 sq. units. Is this correct?
No, I'm sorry
I think you divided by $\frac{4}{\pi}$, where... | 5 | [
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Brevet US5983222 - Method and apparatus for computing association rules for data mining in large database
FIELD OF THE INVENTION
The present invention relates to an analysis of the correlation among data sets in a database, particularly to a means for determining the correlation among data sets having a numerical attr... | 4 | [
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Homework help!!!
November 26th 2007, 09:15 PM
padsinseven
Homework help!!!
I have a midterm tomorrow and can't spend all night trying to figure out what is going on with these problems. PLEASE help!!!! I understand congruence classes but am just having a problem putting
together exactly what is being asked h... | 4 | [
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-0... | 20,625 | 20625 | |
Second order non linear inhomogeneous differential equation.. :(
May 30th 2010, 02:31 AM #1
Member
Joined
Apr 2009
Posts
108
Second order non linear inhomogeneous differential equation.. :(
Solve
y''= x^3/y
I tried by using let u=y'
then I get
u'=x^3/y .. now something tells me this i... | 5 | [
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GMAT Functions
• GMAT Prep (USA)
•
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•
• Favorite GMAT Articles
□ 800score GMAT Course Reviews
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... | 4 | [
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Cauchy Integral
March 10th 2009, 09:39 PM #1
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Oct 2008
Posts
156
Evaluate $\oint_{C} \left(\frac{1}{(z+i)^{3}}- \frac{5}{z+i}+8 \right) \ dz$ where $C$ is the circle $|z+i| = 1$ with positive orientation.
So we have $\int_{C} \frac{1}{(z+i)^{3}} \ dz + -5 \int_{C} \frac{1}{z+i} \ dz + \i... | 5 | [
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probability of rolling a die...
April 16th 2011, 05:16 PM
slapmaxwell1
probability of rolling a die...
ok this problem is a little different from the others...
what is the probability of either a die roll of a six or flipping a coin once and getting a heads?
ok so this means i will use both laws togeth... | 4 | [
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probability of winning a no-ad tennis game
August 30th 2009, 06:01 PM #1
Newbie
Joined
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Posts
7
probability of winning a no-ad tennis game
if the probability of winning a point is p, what is the probability of winning a tennis game under the "no-ad" scoring? (The first player who wins four points... | 5 | [
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Derivative, f(x) question
March 20th 2012, 04:29 AM
Hooperoo
Derivative, f(x) question
hi friends
confused here. question is
f(x) = x / (x-1) use the definition of the derivative to determine f ' (x)
I know it has something to do with inverse functions but i dont know how to start.
working a... | 4 | [
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Astronomy...Earth
October 17th 2008, 12:17 PM #1
MHF Contributor
Joined
Jul 2008
From
NYC
Posts
1,489
Astronomy...Earth
For the question below, use the fact that the orbit of a planet about the Sun is an ellipse, with the Sun at one focus. The aphelion of a planet it its greatest distance from the Su... | 4 | [
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Differential Equations: exact equation
i fell asleep when the professor went over how to solve exact equations :-/ i know it's really easy but despite reading the chapter over and over i still can't get it right. please show me where i'm
going wrong / what to do next.
1. The problem statement, all variables and given/... | 5 | [
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ions
By Jörg Langowski, Chemical Engineer, Fed. Rep. of Germany, MacTutor Editorial Board
This is the first of a series of columns that will deal with the general problem of doing numerical calculations in MacForth. Forth's philosophy is to use integer arithmetic in many cases that would
be handled with floating point... | 5 | [
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Patent US5283837 - Accurate estimation of surface normals in 3-D data sets
BACKGROUND OF THE INVENTION
The present invention relates to the image display arts. It finds particular application in conjunction with providing surface shading for 3-D presentations of diagnostic medical images on video
monitors and will be ... | 4 | [
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... | 20,635 | 20635 | |
Abstract Algebra: Lagrange's Theorem 2
March 16th 2008, 09:59 AM
Jhevon
Abstract Algebra: Lagrange's Theorem 2
Hail Mathematicians,
My last question for the day... I think. Check my solution please.
Problem:
The exponent of a group $G$ is the smallest positive integer $n$ such that $a^n = e$ for ... | 5 | [
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Math Help
August 4th 2009, 05:27 AM #1
Senior Member
Joined
Jan 2009
Posts
381
trigo again
Find the minimum value of the following expression and the value of x between 0 and 360 when the minimum occurs .
3 cos 2x + sin 2x --- this is the expression
3 cos 2x + sin 2x = r cos(2x-a)
$r=\sq... | 4 | [
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Proof in a Metric Space
January 17th 2006, 07:36 AM
TexasGirl
Proof in a Metric Space
Let (X, d) be a metric space, and let V,W contained in X be disjoint (ie the intersection of V and W equals zero), nonempty and closed. Prove that there exist disjoint open V' contained in X and
W' contained in X such that ... | 5 | [
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Patent US5883595 - Method and apparatus for mitigating multipath effects and smoothing groundtracks in a GPS receiver
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to satellite based positioning systems (SATPS) such as the Global Positioning System (GPS).
2. Descriptio... | 4 | [
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... | 20,639 | 20639 | |
derivative word prob
March 19th 2008, 04:26 PM #1
Newbie
Joined
Mar 2008
Posts
13
derivative word prob
Water is leaking out of an inverted conical tank at a rate of 7200.000 cubic centimeters per min at the same time that water is being pumped into the tank at a constant rate. The tank has height
8.0... | 5 | [
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Graph Linear Inequalities in Two Variables
VOCABULARY
Linear inequality in two variables The result of replacing the 5 sign in a linear equation with <,≤,> or ≥
Solution of an inequality in two variables An ordered pair (x, y) that produc... | 4 | [
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Math Help
February 12th 2008, 12:32 AM #1
Member
Joined
Aug 2007
Posts
239
binomial
50 (a) $b(3;8,0.6) = \binom{8}{3}(0.6)^{3}(0.4)^{5} - \binom{8}{2}(0.6)^{2}(0.4)^{6}$
(b) $b(5;8,0.6) = \binom{8}{5}(0.6)^{5}(0.4)^{3} - \binom{8}{4}(0.6)^{4}(0.4)^{4}$
(c) $P(3 \leq X \leq 5) = \binom{8}{5}(0.... | 5 | [
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Heisenberg interaction Hamiltonian for square lattice
Firstly, let's correct your terminology a little bit. The Heisenberg interaction is just:
[tex]\mathcal{H}=\mathcal{J}\sum_{i} S_i \cdot S_{i+\delta} [/tex]
You have rewritten it in terms of [itex]S^z, S^+[/itex] and [itex]S^-[/itex] operators which is fine.
Your ... | 4 | [
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polynomial functions
July 10th 2007, 06:13 PM #1
Junior Member
Joined
Jul 2007
Posts
30
polynomial functions
There is not much information given in this problem, nor is there any examples so I am lost.
Here is the problem:
Decide if it is possible for a parabola to have the indicated number of ... | 4 | [
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Patent US5828980 - Coning compensation in strapdown inertial navigation systems
Publication number US5828980 A
Publication type Grant
Application number US 08/937,251
Publication date 27 Oct 1998
Filing date 1 Jul 1997
Priority date 18 Mar 1996
Fee status Paid
Also published as CA2195811A1, DE6... | 4 | [
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Epsilon Convergence Proof
September 15th 2010, 09:30 PM #1
Newbie
Joined
Sep 2010
Posts
8
Epsilon Convergence Proof
Prove that the sequence sum(i=1 --> n) 1/(10^i) converges.
I'm pretty sure it converges to 1/9 but how to we get there by fixing epsilon?
I'm not sure what you mean by "epsilon co... | 5 | [
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The anticanonical bundle on a flag variety is ample
up vote 6 down vote favorite
4
Hello,
I would like to get references or answers, for the following. How do I show that the anti-canonical line bundle (i.e. dual to top wedge power of cotangent bundle) on a flag variety (of a semisimple
algebraic group in char. 0) is... | 4 | [
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Physics Forums - View Single Post - What time does the grinding wheel stop spinning? (constant ang. accel.)
1. The problem statement, all variables and given/known data
At t=0, a grinding wheel has omega=24.0rad/s, alpha=30.0rad/s^2 until a circuit breaker trips at t=2s. From then on it turns through 432rad as it coas... | 4 | [
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derivatives + tangent line equation
December 6th 2009, 10:21 AM #1
Junior Member
Joined
Oct 2009
Posts
72
derivatives + tangent line equation
For each of the following, compute $\frac{dy}{dx}$ and find the equation for the tangent line at the indicated point x0. You may leave your answers in point-slope ... | 5 | [
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Calculate the solution using X = A^-1B
September 24th 2011, 06:03 AM #1
Member
Joined
Nov 2009
Posts
171
Calculate the solution using X = A^-1B
I wrote the system of equations in the form AX = B, however how would I go about calculating the solution using the equation X = A^-1B?
Re: Calculate the s... | 4 | [
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A bookstore that sells used books sells each of its paperbac
Author Message
TAGS:
A bookstore that sells used books sells each of its paperbac [#permalink] 23 Feb 2014, 06:48
... | 4 | [
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Patent US6072428 - Location determination using doppler and pseudorange measurements from fewer than four satellites
FIELD OF THE INVENTION
This invention relates to use of signals received from fewer than four satellites to determine location of a signal receiver.
BACKGROUND OF THE INVENTION
Location determination ... | 4 | [
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Help finding potential energy of submerged buoyant object
The buoyant force acting on a object is completely determined by its size, so, no, you don't need more information. If you want to know whether this buoyant force will be enough to support its
weight, you need to know its mass too. Thus, whether an object sinks ... | 5 | [
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A (probably complex) integral
June 15th 2011, 11:42 AM #1
Junior Member
Joined
Oct 2010
Posts
56
This is an exercise from Stein & Shakarchi - Complex Analysis
II.7) Prove that $\int_{0}^{2\pi}\frac{1}{(a+\cos\theta)^2} d\theta=\frac{2\pi a}{(a^2-1)^{3/2}}$ for $a>1$
How do I start?
I know ... | 5 | [
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PageRank with Apache Hama
Hey,
some days ago I read in the Hama-dev mailing list about the Nutch project that want a PageRank implementation:
Hi all,
Anyone interested in PageRank and collaborating w/ Nutch project? :-)
Source
So I thought, that I can do this. I already implemented PageRank with MapReduce. ... | 4 | [
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Help random variable
October 10th 2007, 03:39 PM #1
Newbie
Joined
Oct 2007
Posts
9
Thanks
1
Help random variable
The probability that a patient recovers from a stomach disease is .8. Suppose 20 people are known to have contracted this disease.
Let X = # of people who recover out of 20 contracted... | 4 | [
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Deriving Projectile Motion Equations
1. The problem statement, all variables and given/known data
A projectile is fired from ground level at time t=0, at an angle of θ with respect to the horizontal. It has initial speed V[0].
Part A
Find the time it takes the projectile to reach its maximum height. Express in terms... | 4 | [
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The Effect of Bilayer Graphene Nanoribbon Geometry on Schottky-Barrier Diode Performance
Journal of Nanomaterials
Volume 2013 (2013), Article ID 636239, 8 pages
http://dx.doi.org/10.1155/2013/636239
Research Article
The Effect of Bilayer Graphene Nanoribbon Geometry on Schottky-Barrier Diode Performance
^1Faculty of... | 4 | [
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Profit - raising prices
August 19th 2010, 07:48 PM
slicksilver
Profit - raising prices
Assuming an anticipated profit of 25% profit on the selling price, a 5% price increase would mean how much % of the current sales if the same profit is to be retained?
I really dont know how to go about this one. Can some... | 4 | [
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Math Help
January 5th 2007, 05:04 AM #1
Junior Member
Joined
Nov 2006
Posts
26
Pdf
1) The probability density function of a truncated exponential random variable, T, is given by
f(t) = xe^-xt/e^-xa - e^-xb, x > 0; a<= t <= b
a) show that this is a valid density function
b) Given and indep... | 5 | [
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Strange Structures
OK, we are to find the axial force in member EK.
Point A is a pin support, H is a roller.
F_x = A_x = 0
F_y = H_y + A_y - 5F = 0
M_a = 6LH_y - LF - 2LF - 3LF - 4LF - 5LF = 0
These give A_x = 0, H_y = 850 kN, A_y = 850 kN
Now I cut through DE, EK, and KL.
F_y = H_y - 2F - EKsin(45 degrees) = 0
T... | 4 | [
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Statistics - Discrete Random Variable
February 2nd 2007, 09:46 AM #1
Statistics - Discrete Random Variable
Hi, i'm completly at a loss as to how to approach this question and don't know how to answer it, can someone help me please.
The discrete random variable X has c.d.f. F(x) defined by
F(x) = (2+x)/7... | 4 | [
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Finding Maclaurin Series By Division
May 3rd 2008, 10:45 AM #1
Junior Member
Joined
Feb 2008
Posts
48
Finding Maclaurin Series By Division
Find the first four nonzero terms of the Maclaurin series for the function by dividing appropriate Maclaurin series
secx
I know secx=1/cosx and the Maclauri... | 5 | [
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Learn about Algebraic Proofs in Geometry
Learn about Algebraic Proofs in Geometry In this lesson, let's learn about algebraic proofs in geometry. We will learn about properties that justify statements. So before we get to it, let's talk
about properties of congruence because in geometry when we have two different figur... | 4 | [
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Topology Proof
September 27th 2012, 08:33 AM #1
Junior Member
Joined
May 2012
From
NH
Posts
26
Topology Proof
Prove: For any topologies T[1] and T[2] for X, if B[1] is a base for T[1], and if B[1] ⊂ T[2], then T[1] ⊂ T[2].
Using:
Thm 2.1: A is open in (X,T) iff For every p ∈ A, there is G ∈T... | 4 | [
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permutations (1x) and (123 ... n) generate Sn
Conjecture a necessary and sufficient condition involving x and n for (1x) and (123 ... n) to generate Sn.
My conjecture: $(1\ x)$ and $(1\ \cdots\ n)$ generate $S_n$ if, and only if $x-1$ and $n$ are relatively prime. A partial sketch of proof (of the sufficiency): You ca... | 4 | [
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Patent US7725282 - Method for providing a pattern forecast
FIELD OF THE INVENTION
The present invention relates to a method and a device for providing a pattern forecast as well as a computer program and a computer program product.
BACKGROUND INFORMATION
Pattern forecasts usually include mathematical forecasts for f... | 4 | [
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Physics Forums - View Single Post - Statics/Equilibrium - Find the Tension in the Wire
1. The problem statement, all variables and given/known data
I've already solved the problem, though I didn't understand WHY I took the steps I did; I just want to know why this is the way to solving the problem. Here's the question... | 4 | [
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Business mathematics
February 8th 2010, 03:19 PM #1
Newbie
Joined
Jan 2010
Posts
9
Business mathematics
ok im having the hardest time getting an answer for this problem
A marketing firm estimates that n monthsafter the introduction of a clients new product, f(n) thousand household will use it, where... | 4 | [
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No Product at All is 0?
Astrum
I still don't really understand why the product of zero is 1.
0! = 1, in in my mind, 0! = 0
After all, what is 0*0? Or is 0! defined as 1 just for simplicities sake?
It's nothing to do with the "product of zero". It's simply how the factorial of 0 is defined.
n! = n(n-1)...2.1, for... | 4 | [
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Patent US5335250 - Method and apparatus for bidirectional demodulation of digitally modulated signals
FIELD OF THE INVENTION
The present invention relates to the demodulation of digitally modulated signals, particularly those received through channels suffering from one or more impairments, such as fading, intersymbol... | 4 | [
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On Carlson's Type Removability Test for the Degenerate Quasilinear Elliptic Equations
International Journal of Differential Equations
Volumeย 2011ย (2011), Article IDย 198606, 23 pages
http://dx.doi.org/10.1155/2011/198606
Research Article
On Carlson's Type Removability Test for the Degenerate Quasilinear Elliptic Eq... | 5 | [
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Polynomials...
April 3rd 2006, 09:42 AM
The Sky Patrol
Polynomials...
I just can't seem to get my head around this problem...
Suppose that a polynomial function of degree 4 with rational coefficiets has the given numbers as zeros. Find the othe zero(s).
17. -1, (the square root of)3, 11/3
This... | 4 | [
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Chebyshev's Theorem
February 11th 2009, 09:15 PM #1
Member
Joined
May 2008
Posts
103
Use the Chebyshev's theorem and 1-(p(1-p)/(nc^2)) to verify that the probability is at least 35/36 that in 900 flips of a balanced coin the proportion of heads will be between 0.4 and 0.6
Mr F edit: Merged post from ... | 5 | [
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0.00022125244... | 20,674 | 20674 | |
On Certain Inequalities for Neuman-Sándor Mean
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 790783, 6 pages
http://dx.doi.org/10.1155/2013/790783
Research Article
On Certain Inequalities for Neuman-Sándor Mean
^1School of Distance Education, Huzhou Broadcast and TV University, Huzhou 313000, China
^2... | 5 | [
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The existence of root 2
September 30th 2009, 09:51 AM #1
The existence of root 2
Hi guys the analysis continues.
Let $A = \{y \in \mathbb{Q} : y \ge 0, y^2 < 2 \}$
QUESTION 1: Show, without assuming the existence of $\sqrt{2}$, that A does not have a maximal element, i.e. prove that if $y \in A$ then th... | 5 | [
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Patent US6223193 - Macroblock variance estimator for MPEG-2 video encoder
FIELD OF THE INVENTION
The present invention relates to digital circuits and, in particular, to a circuit for processing coded pixels of a video image.
BACKGROUND OF THE INVENTION
The video compression algorithm MPEG-2 requires the calculation... | 4 | [
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Initial velocity of a charged particle acted upon by magnetic and electric fields
Weistber
Force on particle due to Electric Field = E*q
= (1200N/C)(-6.5*10^-3 C)
= -7.8*10^-3N
Answer is correct, along the x axis. So the force is in the -x direction. Charge is -6.5*10
^-6
C. - check typo.
Force on charge due to ... | 5 | [
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Patent US8054215 - Precision registration for radar
RELATED APPLICATION INFORMATION
This application claims priority from U.S. Provisional Application Ser. No. 60/991,588, entitled “PRECISION REGISTRATION FOR RADAR” filed on Nov. 30, 2007, which is incorporated by reference herein
in its entirety.
GOVERNMENT INTEREST... | 4 | [
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Linear regression models with robust parameter estimation
May 15, 2010
By Ralph
There are situations in regression modelling where robust methods could be considered to handle unusual observations that do not follow the general trend of the data set. There are various packages
in R that provide robust statistical me... | 5 | [
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Hyperbolic dynamics
From Scholarpedia
Boris Hasselblatt and Yakov Pesin (2008), Scholarpedia, 3(6):2208. doi:10.4249/scholarpedia.2208 revision #91367 [link to/cite this article]
The study of dynamical systems traditionally concentrates on either continuous-time evolutions, that is, flows or semiflows (these arise ... | 4 | [
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Patent US7167884 - Multistage median cascaded canceller
FIELD OF THE INVENTION
The invention relates in general to an adaptive signal processing system. More specifically, the invention relates to an adaptive signal processing system that utilizes a multistage median cascaded
canceller to formulate an efficient data t... | 4 | [
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find critical numbers of function with absolute value
Please help, the absolute value throws me off. $g(t) = |3t-4|$
Draw the graph, then find the "V" point or cusp and that will be your critical point.
Can you kindly show how to do this with calculus\algebra
You start with definitions! A "critical point" of a funct... | 5 | [
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Probability of getting a card hand dealt in a particular order.
May 12th 2010, 08:03 PM #1
Newbie
Joined
Apr 2010
Posts
5
Probability of getting a card hand dealt in a particular order.
52 cards, dealt 5 cards
P(1st 4 are aces, last is face card)
the answer is 1/1082900
how do i do it (beside... | 4 | [
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Find the general solution of the given differential equation
October 17th 2013, 05:31 AM #1
Junior Member
Joined
Sep 2013
From
United States
Posts
67
Thanks
3
Find the general solution of the given differential equation
$y''+y=7sin(2t)+5tcos(2t)$
Since g(t) is a sum I'll have 2 equations.
... | 5 | [
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... | 20,685 | 20685 | |
Pseudo-Boolean (0-1 Integer Programming) Benchmarks with
Pseudo-Boolean (0-1 Integer Programming) Benchmarks with Hidden Optimum Solutions
If you have any comments or need more instances for the following benchmarks, please send me an email.
The Pseudo-Boole... | 4 | [
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... | 20,686 | 20686 | |
Fractions
The LCD of 6 and 216 is 216. Multiply the first term by 36/36 $\frac{36}{36} \cdot \frac{3\sqrt{2}}{6} = \frac{108 \sqrt2}{216}$ Now they have the same denominator they can be combined $\frac{108 \
sqrt{2} - 8 \sqrt{2}}{216}$ Factor out $\sqrt{2}$ $\frac{\sqrt{2}(108-8)}{216} = \frac{100\sqrt2}{216}$ This equ... | 4 | [
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0.000385284423828125,
-0.06298... | 20,687 | 20687 | |
New Approaches to SPC
May 5, 2003
VIEWING MULTIPLE PROCESS STREAMS ON A BOX PLOT
The meaningful and correct application of control charts can be deceptively difficult. At first glance, introducing a control chart to the shop floor seems easy enough. Pick an important parameter to
measure, determine a sampling strate... | 5 | [
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-0... | 20,688 | 20688 | |
Correction on 9.73 Statistics on Large Sample Tests of Hypotheses?
1. The problem statement, all variables and given/known data
(I forgot to write out the problem statement in previous post)
How do California H.S. students compare to students nationwide in their college readiness, as measured by their SAT scores? The n... | 5 | [
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help with Cantor-Schroder-Berstein problem please!
May 3rd 2008, 08:36 PM #1
Newbie
Joined
May 2008
Posts
2
help with Cantor-Schroder-Berstein problem please!
I really don't get this. Can someone please help me?
Apply the proof of the Cantor-Schroder-Berstein theorem to this situatuion:
A={2,3,4... | 5 | [
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-0.03173828125... | 20,690 | 20690 | |
The adiabatic heat gradient is temperature dependent
Andrew Mason
You cannot take the molecular motion into account. The centripetal acceleration is required in order to keep a mass moving at the earth's rotational speed. For a given volume of air, the centre of
mass of that air, presumably, rotates with the earth. ... | 4 | [
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Math Help
April 28th 2009, 09:48 AM #1
Member
Joined
Oct 2008
Posts
156
closure
Show that $X- E^{\circ} = \overline{X-E}$ where X is a metric space and E is a subset of X. Can we do this without using DMorgan's Laws (e.g. without using intersection of closed sets)?
Because you are taking away $E^{\... | 5 | [
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D.C circuits PLEASE help...are my answers correct?
1. The problem statement, all variables and given/known data
To find the emf and internal resistance of an unmarked battery you are given two resistor of value 5.0(ohms) and an ammeter. When the resistors are connected in parallel the current drawn from the
battery is ... | 4 | [
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Finite rings
August 7th 2009, 04:49 AM
TheAbstractionist
Finite rings
Given a ring $R$ with multiplicative identity, let $U(R)$ denote the set of its units.
What is the smallest positive integer $n$ such that there does not exist any finite ring such that $U(R)$ contains exactly $n$ elements? (Thinking)
Au... | 5 | [
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0... | 20,694 | 20694 | |
Block Preconditioned SSOR Methods for
Journal of Applied Mathematics
Volume 2013 (2013), Article ID 213659, 7 pages
http://dx.doi.org/10.1155/2013/213659
Research Article
Block Preconditioned SSOR Methods for -Matrices Linear Systems
School of Mathematics and Statistics, Hexi University, Zhangye, Gansu 734000, Chin... | 5 | [
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... | 20,695 | 20695 | |
Equation for Tangnet line, Logs
March 31st 2008, 11:23 AM #1
Junior Member
Joined
Feb 2008
Posts
61
Equation for Tangnet line, Logs
Hi, I am having trouble with this problem. Directions are: Find an equation for the tangent line to y=f(x) at the specified point.
f(x)= e^2x / x^2 ; Where x= 1
I ... | 5 | [
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Prove it is a field
December 7th 2008, 05:22 PM #1
Member
Joined
Feb 2008
Posts
125
Prove it is a field
Prove that a commutative ring F is a field iff each equation ax+b=c
(a,b,c is a member of F and a does not equal 0) has a unique solution in F
well, the condition you have is clearly equaival... | 5 | [
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Almost Sequence Spaces Derived by the Domain of the Matrix
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 783731, 8 pages
http://dx.doi.org/10.1155/2013/783731
Research Article
Almost Sequence Spaces Derived by the Domain of the Matrix
Department of Mathematics-Computer Science, Faculty of Sciences, Ne... | 5 | [
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... | 20,698 | 20698 | |
Flux Density (Jy) to Luminosity when wavelength is involved
Hi,
I think my problem may be a little trivial however I have been stuck on it for quite some time. I have plots of flux density (Jy) versus wavelength in order to look at a particular forbidden line. I
want to find the luminosity of the line, however as I am ... | 4 | [
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