content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
Microstrip Tunable Bandpass Filter with the Colinear Resonators
International Journal of Antennas and Propagation
Volume 2013 (2013), Article ID 960138, 5 pages
http://dx.doi.org/10.1155/2013/960138
Research Article
Microstrip Tunable Bandpass Filter with the Colinear Resonators
^1School of Automation and Electrical... | 4 | [
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Prove that a matrix in NOT invertible if an eignvalue is 0
In the basis that diagonalizes the matrix, the matrix can be written : $\begin{pmatrix}<br /> \lambda_1 & 0 & 0 &\ldots & 0 \\<br /> 0 & \lambda_2 & 0 & \ldots & 0 \\<br /> 0 & 0 & \lambda_3 & \ldots
& 0 \\<br /> \vdots & \vdots & \vdots & \ddots & 0 \\<br /> 0... | 5 | [
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0.047607421875... | 22,601 | 22601 | |
Partial PIC-MRC Receiver Design for Single Carrier Block Transmission System over Multipath Fading Channels
International Journal of Antennas and Propagation
Volume 2012 (2012), Article ID 910824, 9 pages
http://dx.doi.org/10.1155/2012/910824
Research Article
Partial PIC-MRC Receiver Design for Single Carrier Block T... | 4 | [
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How do I use Riemman sums to integrate (4-x^2)^(1/2) from 0 to 2?
January 17th 2011, 01:46 PM
eulcer
How do I use Riemman sums to integrate (4-x^2)^(1/2) from 0 to 2?
My calc. AB teacher decided against teaching Riemann sums with sigma notation and as I have been studying BC independently I sort of came up with ... | 5 | [
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0... | 22,603 | 22603 | |
Euler's form
Hi, steps appreciated in the question: [squareroot(2) - i*squareroot(2)]^10 thanks
You need to apply De Moivre's Theorem First, covert this to polar form: You should get $z=2e^{i\left(\frac{3\pi}{4}\right)}$ Thus, $z^{10}=2^{10}e^{i\left(\frac{30\pi}{4}\right)}=2^{ 10}e^{i\left(-\
frac{\pi}{2}+8\pi\right)... | 5 | [
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Want to negate the following statements
July 10th 2011, 09:53 AM #1
Member
Joined
Oct 2010
From
Mumbai, India
Posts
203
Want to negate the following statements
Hi
I have to negate the following statements and then express again
in English. I need to know if I am making any mistakes.
a)E... | 5 | [
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Maclaurin expansion
November 6th 2008, 01:28 PM #1
Newbie
Joined
May 2008
Posts
9
Maclaurin expansion
Find the Maclaurin expansion for $sin^4x$ using the double angle identity for cos2x and cos4x.
So...
This is how i worked out so far, yet i'm not sure whether it is correct or not
Identity ... | 5 | [
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Patent US5751740 - Error detection and correction system for use with address translation memory controller
FIELD OF THE INVENTION
The present invention relates to error detection and correction codes for use in detecting and correcting block errors.
BACKGROUND OF THE INVENTION
Errors are generated in digital system... | 4 | [
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Patente US6275965 - Method and apparatus for efficient error detection and correction in long byte strings using generalized, integrated, interleaved reed-solomon codewords
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of application Ser. No. 08/971,796, filed Nov. 17, 1997, now U.... | 4 | [
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Trig identity, tan(2A)
March 10th 2010, 06:59 PM
monster
Trig identity, tan(2A)
Have a question i'm having some trouble with,
Verify the identity;
(sin A + sin 3A) / (cos A + cos 3A) = tan 2A
not sure best way to go about this one,
tried using sin3A = sin(2A + A) and expanding out but didn't s... | 4 | [
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Predictive FIP
Over the last few weeks, I’ve written about the predictive ability of a simple estimator that consisted of simply subtracting walks from strikeouts. In the latest article, I showed that for starting
pitchers with at least 120 innings pitched in year x and at least 100 IP in year x+1, strikeouts minus wal... | 4 | [
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0... | 22,610 | 22610 | |
Help for Z transform of t^2
June 18th 2010, 09:27 PM #1
Help for Z transform of t^2
I am unable to calculate Z transform of t^2 ( t Square)
Can any body show me step by step method to calculate its Z transform
The (one sided) z-transform is defined as:
$<br /> \displaystyle<br /> \mathcal{Z}(t^2)=\s... | 5 | [
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factoring trinomial squares
July 12th 2008, 03:54 AM
mathtoe
factoring trinomial squares
Hi, Im having difficulty factoring completely. Ive been running into this problem over again.
heres an example:
5y4 + 10y2 + 5
I ended up with:
5y(y3 + 1) 5(Y + 1)
the correct answer is:
5(y2 + ... | 4 | [
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The Flow and Heat Transfer of a Nanofluid Past a Stretching/Shrinking Sheet with a Convective Boundary Condition
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 350647, 9 pages
http://dx.doi.org/10.1155/2013/350647
Research Article
The Flow and Heat Transfer of a Nanofluid Past a Stretching/Shrinking She... | 4 | [
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Finite and Infinite order
April 6th 2010, 01:26 AM
student17989
Finite and Infinite order
an element a of a group is the smallest positive integer m such that a^m = e (where e denotes the identity element of the group, and a^m denotes the product of m copies of a). If no such m
exists, we say that a has infi... | 5 | [
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sigma notation
November 3rd 2007, 08:52 AM #1
Newbie
Joined
Nov 2007
Posts
5
sigma notation
Hi.
I have this example in my boo
I have a similar question which I started,
But I don't really understand how the sigma notation worked in the first link... therefore I don't know the next line on m... | 4 | [
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radius etc
March 12th 2007, 01:59 PM #1
Newbie
Joined
Jan 2007
Posts
6
radius etc
I have a question i need some help on please,
A factory produces metal discs of radius (r - 1) mm and of negligible thickness for making washers and metal spheres of radius r mm for ball bearings. THe total surface are... | 4 | [
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[SOLVED] Find equation of y in terms of x?
August 27th 2008, 05:32 AM
fardeen_gen
[SOLVED] Find equation of y in terms of x?
If x = e^3t & y = e^t, where e is exponential number
Find equation of y in terms of x?
Ans: y^3 = 3x
These are my steps:
x = e^3t
(or) e^(ln x) = e^3t
(or) ln x =... | 4 | [
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power serie representation
December 10th 2006, 05:13 PM #1
Newbie
Joined
Dec 2006
Posts
23
power serie representation
I 've got huge problem with one more example. Didi anyone know hoe to find power series representation of the function:
f(x)= -4x/ (1+2(x)^2)^2
Thank you all for all posible a... | 5 | [
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Solutions
133.
Prove that, if a, b, c, d are real numbers, b ¹ c, both sides of the equation are defined, and
ac - b^2a - 2b + c = bd - c^2b - 2c + d ,
then each side of the equation is equal to
Give t... | 5 | [
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0.03515625... | 22,619 | 22619 | |
Torque problem
November 30th 2007, 09:22 AM #1
Senior Member
Joined
Jan 2007
Posts
477
Torque problem
Er = la = l(w^2 - w0^2)/2*theta
this is for Torque i believe
A CD has a mass of 17 g and a radius of 6.0 cm. When inserted into a player, the CD starts from rest and accelerates to an angular v... | 4 | [
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Transformation
June 18th 2008, 10:01 AM
Simplicity
Transformation
If $T: \begin{pmatrix} x \\y \\z \end{pmatrix} ->\begin{pmatrix} x \\x+y \\x+z \end{pmatrix}$ then what does $T \begin{pmatrix} x+y \\y \\y+z \end{pmatrix}$ equal?
Can you show in steps as I find this topic confusing. Thanks in advance.
June... | 5 | [
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0.0159912109375,
-0.09472656... | 22,621 | 22621 | |
subspace proof
May 2nd 2011, 03:39 PM #1
Junior Member
Joined
Aug 2010
Posts
31
subspace proof
Let (
V;+; ) be R3 with the usual vector addition and scalar multiplication. For each of
the following, either use the subspace test to show that the given W is a subspace of (V;+; )
or explain why... | 4 | [
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Need some help integrating gamma distribution
December 6th 2009, 07:33 PM
jrkapoor
Need some help integrating gamma distribution
Hello,
I am trying to prove that the gamma function is a proper probability distribution (integrates to one).
The gamma function is given as gamma(x) = integral{(a^(x-1))*(e^... | 5 | [
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differentiability and continuity problem
December 13th 2011, 08:35 AM #1
Newbie
Joined
Nov 2011
Posts
22
differentiability and continuity problem
#1 Suppose that the differentiable function $f(x)$ satisfies $f(1)=2$ and $f'(x) \leq 1$. How large can $f(3)$ possibly be?(Done)
If $f(3)=4$, then show th... | 5 | [
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1D wave PDE with extended periodic IC
I have formula for 1D wave equation:
(*) u(x, t) = 1/2 [ f(x + ct) + f(x - ct) ] + 1 / (2c) Integral( g(s), wrt
s, from x-ct to x+ct )
I am trying to find u(1/2, 3/2) when L = 1, c = 1, f(x) = 0, g(x) = x(1 -
x).
However, for (*) to work, the initial position f(x) and initial ve... | 4 | [
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O
GRAPHING OSCILLATING FUNCTIONS
© Department of Physics, University of Guelph
A class of functions which occur frequently in all sciences are those which are oscillatory, and in particular, those which are characterized by a sine or cosine. These functions arise in many ways
in science but your first int... | 4 | [
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Patent US5471101 - High efficiency electrical machine with minimized material content
BACKGROUND OF THE INVENTION
1. Technical Field
The present invention relates generally to the field of electric machines, e.g., motors and generators, and in particular to methods used to design high-efficiency electric machines.
2... | 4 | [
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0.06884765625,
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0.0107421875,
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0.08740234375,
-0.03759765625,
-0.0283203125,
0.0108642578125,
0.04150390625,
0.0279541015625,
-0... | 22,627 | 22627 | |
Simple Separation of Variable Problem
January 22nd 2011, 12:15 PM #1
Newbie
Joined
May 2008
Posts
3
Simple Separation of Variable Problem
I'm just starting a course in DiffEQ and we have a simple separation of variables problems.
The problem is to change the dy/dt equation into a simple y(t) equatio... | 5 | [
-0.07177734375,
0.0107421875,
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0.04541015625,
0.09375,
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0.049560546875,
-0.09765625,
0.0004138946533203125,
-0.035888671875,
-0.013732... | 22,628 | 22628 | |
Root Finding Algorithms using Derivatives
33.9 Root Finding Algorithms using Derivatives
The root polishing algorithms described in this section require an initial guess for the location of the root. There is no absolute guarantee of convergence—the function must be suitable for this
technique and the initial guess m... | 4 | [
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0.... | 22,629 | 22629 | |
Finding two unknows from one equation
April 22nd 2009, 01:59 AM #1
Newbie
Joined
Apr 2009
Posts
1
Finding two unknows from one equation
Dear members
I have been set a task to find n and m (two constants) in the following equation: N=(z^m).(r^n). I have been provided with data for N, z and r. I am as... | 4 | [
-0.0732421875,
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0.0380859375,
0.0947265625,
0.08447265625,
0.11865234375,
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0.0761... | 22,630 | 22630 | |
Difference between unique solution and particular solution
inter060708
For first order ordinary differential equations.
Are each particular solution a subset of unique solutions? Please explain, thanks
It's the other way around. A "unique solution" to a differential equation
with specific conditions
is one of an... | 5 | [
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-0.... | 22,631 | 22631 | |
Some Out of the Box FORMULAS and SHORTCUTS
These formulas can be used as shortcuts for time saving and finding the right answer by elimination.
Sorry beforehand for not using the proper mathematical symbols
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
To find the number of factors of a given number, e... | 4 | [
0.0252685546875,
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0.047119140625,
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0.023803... | 22,632 | 22632 | |
Studies on Biosorption of Methylene Blue from Aqueous Solutions by Powdered Palm Tree Flower (
International Journal of Chemical Engineering
Volume 2014 (2014), Article ID 306519, 13 pages
http://dx.doi.org/10.1155/2014/306519
Research Article
Studies on Biosorption of Methylene Blue from Aqueous Solutions by Powdere... | 4 | [
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... | 22,633 | 22633 | |
I am given a side length and an angle, find the remaining side lengths.
January 15th 2014, 08:33 PM #1
Junior Member
Joined
Feb 2013
From
PA
Posts
26
I am given a side length and an angle, find the remaining side lengths.
Hi all,
The problem is: A right triangle has a hypotenuse of length 15 met... | 4 | [
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0.0082397460937... | 22,634 | 22634 | |
P(s,t)=\sum_{0}^{\infty}\sum_{0}^{\infty}a_{m,n}s^ mt^n
January 11th 2011, 11:49 AM
dwsmith
P(s,t)=\sum_{0}^{\infty}\sum_{0}^{\infty}a_{m,n}s^ mt^n
If $\displaystyle\mbox{P(s,t)}=\sum_{m=0}^{\infty}\sum _{n=0}^{\infty}a_{m,n}s^mt^n$ where the coefficients $a_{m,n}$ satisfy the recurrence relation
$(m+1)a_{m... | 5 | [
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Need Help Solving A Problem
April 26th 2010, 12:27 PM #1
Newbie
Joined
Apr 2010
Posts
1
Need Help Solving A Problem
The time it takes Eric to drive to Marta's place varies inversely with his driving rate. When he drives at 30 mph, it takes him 45 minutes. If he makes the drive in half an hour, how fast i... | 4 | [
0.029296875,
0.07421875,
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0.051513671875,
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0.0231933... | 22,636 | 22636 | |
Riemann Mapping (Complex)
November 25th 2008, 03:19 PM #1
Member
Joined
Mar 2008
Posts
99
Riemann Mapping (Complex)
Use conformal maps or combinations of conformal maps such as linear fractional transformations, powers, roots, sin z, log z, etc., to find a one-to-one analytic function mapping the given r... | 5 | [
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-0.073... | 22,637 | 22637 | |
Modeling of Configuration-Dependent Flexible Joints for a Parallel Robot
Advances in Mechanical Engineering
Volume 2010 (2010), Article ID 143961, 12 pages
http://dx.doi.org/10.1155/2010/143961
Research Article
Modeling of Configuration-Dependent Flexible Joints for a Parallel Robot
^1Department of Mechanical and Ma... | 4 | [
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0.02282... | 22,638 | 22638 | |
Backwards intergration
April 3rd 2012, 05:37 AM #1
Member
Joined
May 2009
Posts
109
Backwards intergration
$\int\!\frac{1}{(1+x^2)^2}dx$ where x = tan u and u = arctan x
I can't see where acrtan has come from. What part of the integrand is arctan?
Re: Backwards intergration
They chose x= tan(u... | 5 | [
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Convergent sum / divergent product
November 14th 2011, 07:21 PM #1
Newbie
Joined
Oct 2010
Posts
12
Convergent sum / divergent product
Hi guys,
This is apparently a fairly well-known example, but I can't seem to figure it out. Anyone know this? Want
$\sum_{n=1}^\infty a_n < \infty$
but
... | 4 | [
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Im stuck!
1. October 9th 2008, 10:23 AM #1
2. October 9th 2008, 10:27 AM #2
For the first question, use the quadratic formula. The solutions for $ax^2 + bx + c = 0$ are $x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$.
For the second question, completing the square is a good idea. You will get $b^2 = \le... | 4 | [
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... | 22,641 | 22641 | |
Nonlinear Fractional Jaulent-Miodek and Whitham-Broer-Kaup Equations within Sumudu Transform
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 160681, 8 pages
http://dx.doi.org/10.1155/2013/160681
Research Article
Nonlinear Fractional Jaulent-Miodek and Whitham-Broer-Kaup Equations within Sumudu Transform
... | 5 | [
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... | 22,642 | 22642 | |
Main / Advanced Physics 2013 & 2014 : Free Physics Notes > Atomic Physics
IIT JEE / CET – Main / Advanced Physics 2013 & 2014 : Free Physics Notes > Atomic Physics
The bleeding edge of atomic research - compact muon solenoid detector at CERN
ATOMIC PHYSICS - MIND MAP
Atomic physics - click to zoom
A T ... | 4 | [
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0.0336914... | 22,643 | 22643 | |
Bayesian Estimation and Prediction for Flexible Weibull Model under Type-II Censoring Scheme
Journal of Probability and Statistics
Volume 2013 (2013), Article ID 146140, 16 pages
http://dx.doi.org/10.1155/2013/146140
Research Article
Bayesian Estimation and Prediction for Flexible Weibull Model under Type-II Censorin... | 4 | [
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-0.037841796875,
-0.0869... | 22,644 | 22644 | |
Proximal Point Algorithms for Finding a Zero of a Finite Sum of Monotone Mappings in Banach Spaces
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 232170, 7 pages
http://dx.doi.org/10.1155/2013/232170
Research Article
Proximal Point Algorithms for Finding a Zero of a Finite Sum of Monotone Mappings in Ba... | 5 | [
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0.025634765625,
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-0.0257568359... | 22,645 | 22645 | |
A Survey Design for a Sensitive Binary Variable Correlated with Another Nonsensitive Binary Variable
Journal of Probability and Statistics
Volume 2013 (2013), Article ID 827048, 11 pages
http://dx.doi.org/10.1155/2013/827048
Research Article
A Survey Design for a Sensitive Binary Variable Correlated with Another Nons... | 4 | [
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Goldbach conjecture proof
metheor
I can prove the goldbach conjecture with a simple method
but first I prove square of any prime -1 can be divided by 12
primexprime -1 = 12k k is an integer .
This is not really hard (and works only for primes greater than 3):
Let p be a prime number.
p[itex]^{2}[/itex]-1 = (p+1)(... | 4 | [
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0.... | 22,647 | 22647 | |
Vector Potential
ManuelF
That is a necessary condition, but I do not think is enough!
Are you sure?
Thank you.
It is necessary and sufficient in Euclidean space.
For instance, in magnetostatics a magnetic field always has a vector potential.
If the field is B = (u,v,w) consider the 2 form udy^dz -vdx^dz + wdx^dy
... | 4 | [
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0.04052734375,
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-0.15... | 22,648 | 22648 | |
Oracle Musings
April 7th, 2012 — ddelmoli
I’d like to thank Jonathan Lewis for taking up my challenge and writing up a proof that there is indeed a formula that solves Cary Millsap‘s string problem for not just circles, but for any regular
polygon.
Like Jonathan, I found the problem intriguing, and “wasted” a few hou... | 4 | [
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... | 22,649 | 22649 | |
system of equations
January 25th 2010, 06:05 PM #1
Member
Joined
Nov 2009
Posts
80
system of equations
solve the system of equations where x,y are variables and a,b are constants:
x + y = a
(x^2)*y + x*(y^2) = b
Dear jmedsy,
$x+y=a$-------A
$(x+y)xy = axy$
$axy=b$--------B
... | 4 | [
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particular subset of integers generating rational numbers
up vote 1 down vote favorite
Hello, maybe this is a naive question, but so far I did not found anything related to the subject.
I would like to consider a subset of integers, say E, such that the set $\{ \frac{x}{y}, x \in E, y \in E, y \neq 0 \}$ is $\mathbb{... | 5 | [
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... | 22,651 | 22651 | |
Fundamentals of Matrix Computations (Pure and Applied Mathematics: A Wiley-Interscience Series of Texts, Monographs and Tracts)
Special Offers see all
More at Powell's
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... | 4 | [
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0.025756... | 22,652 | 22652 | |
Physics Forums - To find logarithm of a complex number
-
General Math
(
http://www.physicsforums.com/forumdisplay.php?f=73
)
AlbertEinstein Jun22-06 12:33 PM
To find logarithm of a complex number
#2
Hi,
Well can anyone tell me how to find the natural logarithm of a complex number p + iq.
Also please tell m... | 5 | [
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-0.02294921875,
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0.0211181640625,
... | 22,653 | 22653 | |
Determining a δ
September 4th 2009, 08:53 AM #1
Determining a δ
I have absolutely no idea how to solve these type of problems. My teacher gave a lecture about this subject two days ago, and I took a look at this stickied thread, but I'm still stuck. :s
In exercises 1–8, numerically and graphically determine... | 5 | [
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... | 22,654 | 22654 | |
New Partition Theoretic Interpretations of Rogers-Ramanujan Identities
International Journal of Combinatorics
Volume 2012 (2012), Article ID 409505, 6 pages
http://dx.doi.org/10.1155/2012/409505
Research Article
New Partition Theoretic Interpretations of Rogers-Ramanujan Identities
Center for Advanced Study in Mathe... | 5 | [
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0.08251953125,
-0.002044677734375,
0.1279296875,
-0.04833984375,
-0.0033416748046875,
0.000885009765625,
0.04638671875,
-0.001922607421875,
-0.0169677734375,
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-0.040283203125,
0... | 22,655 | 22655 | |
Need help translating standard form quadratic equations into factored form?
May 29th 2008, 08:26 AM #1
Junior Member
Joined
Dec 2007
Posts
34
Need help translating standard form quadratic equations into factored form?
Could someone please translate these equations and explain the steps for doing it?
... | 4 | [
-0.08642578125,
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0.02783203125,
0.0402832031... | 22,656 | 22656 | |
Patent US5781569 - Differential trellis decoding for convolutional codes
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a method and apparatus for decoding convolutional encoded signals. Such signals are commonly used in communications and recording systems which employ error correcti... | 4 | [
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0.0361328125,
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0.0625,
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0.107421... | 22,657 | 22657 | |
Steady State Error Calculation to Input Step and Ramp Input
Since G(s) is unstable in open loop (it has poles in the right half-plane), I'm going to assume we're talking about using it in a feedback configuration.
Let the system error, e(t), be given as:
e(t) = r(t) - c(t)
where r(t) and c(t) are the system input an... | 5 | [
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... | 22,658 | 22658 | |
Does this function exist?
December 5th 2009, 11:38 AM
paupsers
Does this function exist?
Does there exist a continuous function f:[0,1]-->[0,1] such that for all y in [0,1], $f^{-1}$(y) contains a finite even number (possibly zero) of points in [0,1]. If no, prove it. If yes,
construct an example.
Any i... | 5 | [
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Holomorphic function in poloar coordinates?
February 9th 2010, 11:48 AM #1
Member
Joined
Oct 2009
Posts
195
Holomorphic function in poloar coordinates?
Okay, so if $f(z) = u(x,y) + iv(x,y)$, then in polar coordinates, since $z = \rho e^i\theta$, then...
$f(z) = f(\rho e^i\theta ) = u(\rho ,\the... | 4 | [
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-0.125,
-0.08935546875... | 22,660 | 22660 | |
Math Help
January 1st 2013, 07:04 PM #1
Member
Joined
Oct 2011
Posts
86
Thanks
2
Confusion...
$\int \frac{sec^2(x)}{1-tan^2(x)}dx$
$u=Tan(x)$
$du=sec^2(x)dx$
$\int \frac{1}{1-u^2}du$
Now, I'm really tempted to use arcsin, but the denominator isn't a radical, so how do I deal with 1/... | 5 | [
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integrate to find area
April 8th 2010, 04:49 PM #1
Junior Member
Joined
Sep 2008
From
houston
Posts
25
integrate to find area
i am doing area between curves. now i im on like the third step. i did the top minus bottom and now my integral is this.
integral going from 1 to 5 (1/x^2) dx...
now... | 4 | [
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0.0673828125,
0.026123046875,
-0.0... | 22,662 | 22662 | |
Finding the exact value of sin 3
November 13th 2008, 04:27 PM #1
Newbie
Joined
Oct 2008
Posts
4
Finding the exact value of sin 3
Question says if...
$cos 72 = \frac{\sqrt5 - 1}{4}$
then find the exact value of sin 3
How would one go about doing this?
Re: Finding the exact value of sin 3
... | 5 | [
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Factoring?
October 21st 2007, 02:21 PM
Dunit0001
Factoring?
1) x^2 - x - a - a^2
2) x^4 - 3x^2 - 4
3) x^4 - 8x^2 + 16
4) xy + 2 - 2x - y
5) 5s^2 - 16s + 12
6) 6a^3 - 7a^2b - 2ab^2
How do I factor these completely? I'm really lost right now
October 21st 2007, 02:33 PM
galactus
... | 4 | [
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Problems on engineering mechanics
these are a few problems from a book called meriam in which i(and some of my classmates) had got a bit stuck. some help will be welcome.
1) in a handling test, a car is driven through the slalom course shown. It is assumed that the car path is sinusoidal and that the maximum central... | 5 | [
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0.0079956054... | 22,665 | 22665 | |
functions and models
September 27th 2007, 07:30 AM #1
Newbie
Joined
Sep 2007
Posts
5
functions and models
The following problems are the only problems from my homework that i couldn't not solve or rather figure out. If i could by any chance receive any help to that would be great. -please if you help
... | 5 | [
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Lever paradox
Chronos
Length and forces are vectors. The original question was directionally confused. The applied forces are vectors, not masses [that is a mixed reference frame]. They are aligned 90 degrees apart from
one another and rotate symmetrically. The vector products are not important. Your first intuition w... | 4 | [
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Further maths. Cubics. What?
October 3rd 2008, 04:28 AM
djmccabie
Further maths. Cubics. What?
Ok this 1 confused my maths teacher! You might need a pen and paper for this....
We have the equation 3x^3 + 6x^2 - 4x +7 = 0 with roots a,b,c
we gotta find the equation with root b+c, c+a, a+b
We did quit... | 4 | [
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0.078613281... | 22,668 | 22668 | |
Heat equation, Fourier cosine transform
fluidistic
Ok I've checked another source for the definition of the cosine transform, I'll use it instead. I'm having a doubt however.
u depends on x,y and t.
It's actually only a function of x and y because you're looking for the steady-state solution.
The cosine transform ... | 4 | [
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Physics Forums - View Single Post - Electric Displacement Field
Vanush
Can someone please post a problem/situation outlining the motivation / usefulness of the electric displacement field? (Particularly with a capacitor) I'm having trouble understanding the concept and
information is sparse on the internet.
Hi Van... | 4 | [
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User:WillNess
From HaskellWiki
(Difference between revisions)
← Older edit Newer edit →
Line 19: Line 19:
<code>foldi</code> is on [[Fold#Tree-like_folds|Tree... | 4 | [
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... | 22,671 | 22671 | |
Isomorphic
October 23rd 2009, 11:24 AM #1
Junior Member
Joined
Oct 2009
Posts
58
Isomorphic
Let G be the additive group if all polynomials in x with coefficients in $\mathbb{Z}$, and let H be the multiplicative group of all positive rationals. Prove that G $\cong$ H
I'm think if I list the prime nu... | 4 | [
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0.004638671875,
-0.0169677734375,
-0.0... | 22,672 | 22672 | |
Modeling and Analysis of Bifurcation in a Delayed Worm Propagation Model
Journal of Applied Mathematics
Volume 2013 (2013), Article ID 927369, 11 pages
http://dx.doi.org/10.1155/2013/927369
Research Article
Modeling and Analysis of Bifurcation in a Delayed Worm Propagation Model
^1College of Information Science and ... | 5 | [
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Assimilating Seizure Dynamics
Abstract
Observability of a dynamical system requires an understanding of its state—the collective values of its variables. However, existing techniques are too limited to measure all but a small fraction of
the physical variables and parameters of neuronal networks. We constructed models... | 4 | [
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0.08837890... | 22,674 | 22674 | |
Integral problem
April 4th 2009, 11:01 AM #1
Hello!
Can someone help me with this problem (advanced section):
Calculate the indefinite integral $\int[(1+\sin(x))/(1-\sin(x))^2]dx$, not using a universal substitution $\tan(x/2)=t$.
Thanks in advance!
Multiply numerator and denominator by $(1 + \s... | 5 | [
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0.02319... | 22,675 | 22675 | |
Math Help
April 28th 2009, 10:54 AM #1
Junior Member
Joined
Aug 2008
Posts
44
induction
Show that for all positive integers n , we have.
1 + 1/sqrt(2) + 1/sqrt(3) + ... + 1/sqrt(n) < 2*sqrt(n)
I have shown the base case:
Now i need to assume the inductive case to show
...... 1/sqrt(n+... | 4 | [
-0.012451171875,
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0.053466796875,
0.03613281... | 22,676 | 22676 | |
Could really use some help
April 11th 2006, 10:05 AM #1
Newbie
Joined
Mar 2006
Posts
4
Could really use some help
Im at a point in my book where I have to graph functions of sine and cosine
one such example of the problems is
Graph 1 cycle and lable 5 points on each.
F(x)=sin pie x <---- tha... | 4 | [
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-... | 22,677 | 22677 | |
Math Help
February 5th 2010, 09:17 AM #1
Member
Joined
Jan 2008
Posts
173
digits
Of all the four-digit positive integers containing only digits from the set {2, 4, 6, 8}, what fraction of them have at least one of their digits repeated? Express your answer as a common
fraction.
Hi sri340,
... | 4 | [
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-0.00482177734375,
-0.07080078125,
0.050048828125,
-0.0537109375,
-0.0281982421875,
... | 22,678 | 22678 | |
-Admissible Sublinear Singular Operators and Generalized Orlicz-Morrey Spaces
Journal of Function Spaces
Volume 2014 (2014), Article ID 505237, 7 pages
http://dx.doi.org/10.1155/2014/505237
Research Article
-Admissible Sublinear Singular Operators and Generalized Orlicz-Morrey Spaces
Institute of Mathematics and Mec... | 4 | [
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-0.0002841949462890625,
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0.02880859375,
-0.00549316406... | 22,679 | 22679 | |
Patent US20050025263 - Nonlinear overlap method for time scaling
BACKGROUND OF INVENTION
1. Field of the Invention
The present invention relates to a signal-synthesizing method, and more particularly, to a nonlinear overlap method for time scaling.
2. Description of the Prior Art
Due to the dramatic progress in ele... | 4 | [
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... | 22,680 | 22680 | |
How many ways can the number 50 be witten as the sum of 10 non-negative, even number?
April 7th 2009, 04:28 PM
gravity2910
How many ways can the number 50 be witten as the sum of 10 non-negative, even number?
Hi,
Please help me to find out: in how many ways the number 50 can be witten as the sum of 10 non-n... | 4 | [
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0.02587890625,
-0.016357421875,
0.0400390625,
-0.022705078125,
-0.05224609... | 22,681 | 22681 | |
Gaussian Integers and Pythagorean Triplets
robert Ihnot
4n(n+1)+1 =(2n+1)^2, but it can not equal A+Bi, because you are not considering the imaginary part, are you?
If, instead, we take the form Z=A+Bi, and look at (2Z+1)^2, what do we do now?
If n=Z = 1+2i for example
[tex]4*(1+2i)*(2+2i) + 1 = -7+24i = (3+4i)^2... | 4 | [
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0.0207519531... | 22,682 | 22682 | |
Should we ever use a complex ERA estimator?
In the past weeks I’ve written thousands of words about estimating runs allowed for pitchers. I’ve probably written more than was necessary on the subject, and it really has been a more taxing
experience than I originally expected. After last week’s piece on relievers, I had ... | 4 | [
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One contradiction between maximal ideals and prime ideals.
December 23rd 2012, 06:06 PM #1
Junior Member
Joined
Nov 2012
From
Taiwan
Posts
41
One contradiction between maximal ideals and prime ideals.
First of all, according to the textbook that I use, there are some theorems about maximal and prime ... | 5 | [
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Optimization Problems of Costs in a MultiState System with Imperfect Maintenance
Journal of Quality and Reliability Engineering
Volume 2014 (2014), Article ID 592527, 10 pages
http://dx.doi.org/10.1155/2014/592527
Research Article
Optimization Problems of Costs in a MultiState System with Imperfect Maintenance
Tunis... | 4 | [
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Series Circuits
As mentioned in the previous section of Lesson 4, two or more electrical devices in a circuit can be connected by series connections or by parallel connections. When all the devices are connected
using series connections, the circuit is referred to series circuit. In a series circuit, each device is con... | 4 | [
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Patente US6348848 - Transformer having fractional turn windings
BACKGROUND OF THE INVENTION
This application is a continuation-in-part of a provisional patent application of the same name, Ser. No. 60/201,999 filed May 4, 2000. Priority to that date is claimed.
This invention relates to transformers, especially to tr... | 4 | [
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Approximate Solutions of Hybrid Stochastic Pantograph Equations with Levy Jumps
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 718627, 15 pages
http://dx.doi.org/10.1155/2013/718627
Research Article
Approximate Solutions of Hybrid Stochastic Pantograph Equations with Levy Jumps
^1School of Mathematics ... | 5 | [
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(1.0 / 2) process repeated 5 times; what is the algrabraic formula?
mr magoo
This is a new one;
64 / 2 = 32
32 / 2 = 16
16 / 2 = 8
8 / 2 = 4
4 / 2 = 2
2 / 2 = 1
1 / 2 = 0.5
0.5 / 2 = 0.25
0.25 / 2 = 0.125
0.125 / 2 = 0.0625
0.0625 / 2 = 0.03125
[itex]\frac{64}{2^{10}}[/itex]
Also notice that since we divided 64 b... | 4 | [
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Algebra, Problems For Fun (7)
May 15th 2009, 02:29 PM #1
MHF Contributor
Joined
May 2008
Posts
2,295
Thanks
7
Algebra, Problems For Fun (7)
Definition: A group $G$ is called hopfian if every surjective homomorphism $G \longrightarrow G$ is injective. Clearly every finite group is hopfian.
Probl... | 5 | [
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... | 22,690 | 22690 | |
Solving degree 7 polynomials
May 18th 2008, 11:27 AM #1
Member
Joined
May 2008
Posts
186
Solving degree 7 polynomials
How would one go about solving the following...
ax^7 + bx^6 + cx^5 + dx^4 + fx^3 + gx^2 + hx + j = 0
I'm looking for a general answer, i.e. no specific values of the coefficient... | 5 | [
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0.... | 22,691 | 22691 | |
a few math team problems need help with
December 23rd 2010, 12:27 PM
amerlaw1
a few math team problems need help with
1. from a point within an equilateral triangle, perpendiculars of length 3,6,9 are dropped to the sides. find the area of the triangle.
2. What is the distance between the incenter and circu... | 4 | [
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second-differentiable function proving help
May 9th 2013, 08:20 AM
orir
second-differentiable function proving help
f is a second-differentiable function at $(0,\infty)$ so $f''(x)>0$ to every $x\in(0,\infty)$
i need to prove that if: $lim{}_{x\rightarrow\infty}f(x)=\ell$$(\ell$ is finite), so -
(1) $f'(... | 5 | [
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Mid-Terms Review
January 15th 2008, 06:39 PM
Rocher
Mid-Terms Review
I just have a few questions I don't quite understand. Hope you guys can help me.
Calculate the distance between each of the following pairs of points.
1) I(8,2) and J(-2,-3)
This means find the slope of the two points right? My f... | 4 | [
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... | 22,694 | 22694 | |
subspace theorem differential equation for a subspace? Attempt but cannot solve.HELP!
March 25th 2013, 10:17 PM #1
Newbie
Joined
Mar 2013
From
Australia
Posts
2
I can't seem to work out this question because it's so weird The set F of all function from R to R is a vector space given the diffential equ... | 4 | [
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Rondon Nikodym derivative
January 8th 2010, 03:02 PM #1
Member
Joined
Dec 2008
Posts
154
Rondon Nikodym derivative
Let $\mu,u$ be measures on $(X,F)$ such that $u << \mu$ and $\lambda = \mu+u$. Show that $f= \frac{du}{d\lambda}$ exists and satisfies $0 \leq f \leq 1$ a.e $\lambda$.
(Hint: $\mu_1 << \... | 4 | [
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Differentiation questions.
October 3rd 2010, 10:45 AM #1
Newbie
Joined
Jul 2010
Posts
18
I am also on the next question, i have solved a few and struggling with others?
2. obtain dy/dx for the following functions using the 'direct rule'
a) y=2.5x^2
=5x
b) y=x^2/2.5
=0.8x
c) y=2... | 4 | [
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perlmeditation eyepopslikeamosquito <P> The dark art of unearthing magic formulae to improve your golf score was highlighted recently by [thospel] during the [id://594299|Fonality Golf Challenge]. </
P> <P> During the recent follow-up <a href="http://codegolf.com/roman-to-decimal">codegolf Roman to Decimal game</a>, I ... | 5 | [
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Calculus Optimization Problem
Let's generalize a bit to say we want to find the quickest path across two media: We are traveling from point A to point B then to point C by the quickest path possible. The question is, where should
point B be placed? I have set up xy coordinate axes such that: $O=(0,0)$ $A=(0,-W_1)$ $B=(... | 5 | [
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