content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
differential equation
July 28th 2007, 10:44 AM
viet
differential equation
solve $y'' - 3y' - 10 y = 0; \quad y = 1, y'=10 \;\textnormal{at}\; x = 0$
$y(x) =$
heres what i did:
$r^2-3r-10 = 0$
$(r-2) (r-5) = 0$
roots are : -2, 5
General solution: $y = C_1 e^{-2x}+C_2 e^{5x}$
$y' ... | 4 | [
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0.0703125,
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0.03857421875,
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-0.043212890625,
-0.0112915039... | 17,700 | 17700 | |
Patent US5377201 - Transitive closure based process for generating test vectors for VLSI circuit
This is a continuation-in-part of application Ser. No. 07/717,081, filed Jun. 18, 1991, and now abandoned.
FIELD OF THE INVENTION
This invention relates to the testing of VLSI circuits and more particularly relates to the... | 4 | [
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... | 17,701 | 17701 | |
Patent US7356504 - Methods for determining value at risk
CROSS-REFERENCE TO RELATED APPLICATIONS
This application claims priority to U.S. Provisional Application No. 60/200,742, filed May 1, 2000; U.S. Provisional Application No. 60/200,743, filed May 1, 2000; U.S. Provisional Application No. 60
/200,744, filed May 1,... | 4 | [
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0... | 17,702 | 17702 | |
Find the points where two circles cross
October 18th 2010, 09:45 AM #1
Member
Joined
Jul 2009
From
London
Posts
109
Find the points where two circles cross
I have two circles with equations:
(x - 1)^2 + (y - 4)^2 = 25 and (x - 9)^2 + (y - 4)^2 = 16
And I need to work out where the "lines" of... | 4 | [
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-0.06591796875,
-0... | 17,703 | 17703 | |
Lines tangent to a point on a circle in the complex numbers.
March 11th 2011, 09:30 AM #1
Junior Member
Joined
Feb 2011
Posts
34
Lines tangent to a point on a circle in the complex numbers.
Hello all, the question I am trying to prove is as follows:
Let $C$ be the circle ${z: |z-c| = r}, \; r > 0;$
... | 4 | [
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-... | 17,704 | 17704 | |
Worst Case Error
April 13th 2013, 04:25 PM #1
Newbie
Joined
Oct 2012
From
Australia
Posts
14
Worst Case Error
A metal pipe with outer radius of 10cm ,inner radius of 8cm and length of 20 have allowed errors of 1cm, 0.5cm and 2cm respectively. If need to estimate the worst-case error in volume.
S... | 5 | [
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0.056640... | 17,705 | 17705 | |
Math Help
September 26th 2012, 03:23 PM #1
Junior Member
Joined
Jul 2012
From
auckland
Posts
46
intergration
y= (x/ √ a^2 - x^2 ) - sin^-1 (x-a) (integrate)
∫ ln x /x^2 dx
∫ cos^6 1/2x dx
umm how do i do these ! pleases show me with working
thank you
Re: intergration
In ... | 5 | [
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Coins in a jar word problem
July 23rd 2010, 10:46 AM #1
Newbie
Joined
Jul 2010
Posts
6
Coins in a jar word problem
I just joined today, thank you for making this forum. I will be coming here often, again thank you all so much.
Here is the problem.
The problem starts with coins in a jar and I mus... | 4 | [
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How to simplify/solve this differential equation
Hi JulieK!
I suggest you use the Quote button to retain the quotes and the formulas.
JulieK
"If I substitute g(x) for the first y that suggests it should not be derived.
I suspect that was not your intention...
Actually I would suggest to write it as y(x) instead of... | 4 | [
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Michaelis-Menten Equation
Alfisol, Item 003: LMMpro, version 1.06
The Langmuir Optimization Program
plus
The Michaelis-Menten Optimization
Program.
HOME The Langmuir The Michaelis-Menten FREE FREE Registra... | 4 | [
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Trig Problem
November 20th 2008, 10:55 PM
xwrathbringerx
Trig Problem
http://www.mathhelpforum.com/math-he...rther-trig.bmp
(a) Explain why AP = 2cosθ.
(b) Find a similar expression for BP in terms of θ.
(c) Explain why the coordinates of pt P is (cos2θ, sin2θ).
(d) Prove that triangle APQ is... | 4 | [
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Toolgraph Design of Optimal and Feasible Control Strategies for Time-Varying Dynamical Systems
Mathematical Problems in Engineering
Volume 2012 (2012), Article ID 142060, 16 pages
http://dx.doi.org/10.1155/2012/142060
Research Article
Toolgraph Design of Optimal and Feasible Control Strategies for Time-Varying Dynami... | 4 | [
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Group mod a subgroup
when H is a normal subgroup of G, G/H can be made into a group by setting coset multiplication as: (Hx)(Hy) = H(xy).
the condition of normality is necessary, because Hx is not uniquely determined by x (it has other members of G in it, as well), and if Hx ≠ xH (equivalently if xHx^-1 ≠ H), then th... | 4 | [
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Diagonilizablity question
April 26th 2010, 08:51 AM #1
Member
Joined
Sep 2009
Posts
177
Thanks
1
Diagonilizablity question
Let A be an nxn matrix with eigenvalue ∆ with multiplicity n. Show that A is diagonizable iff A=∆I, where I is the nxn idenity.
$\Delta$ eigenvalue of $A$ of multiplicit... | 4 | [
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Successive Measurements of angular momentum
First off, I think you meant for the bottom middle entry of the matrix to be a positive one, no? Otherwise, that J[y] just has eigenvalues of zero.
I would think you take the eigenvector corresponding to the [itex]J_y = \hbar[/itex] measurement, which corresponds to your st... | 4 | [
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recurrence
the range is given in this way: y1=-1 y(n+1)=1/3y(n)+3 Find a f function y(n)=f(n) thanks
For $y_{n+1} = \frac{1}{3} y_n + 3$ for let $y_n = z_n + k$ so the difference equation becomes $z_{n+1} + k = z_n + \frac{1}{3}\left( z_n + k \right) + 3$ and choosing $k = \frac{9}{2}$ gives $z_
{n+1} = \frac{1}{3} z_... | 5 | [
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Can you help simplify?
It's hard to type this expression, the 5's 2's and -2 in red are exponents. Please help simplify: (2a5b2/4a5b-2) -4
Yes pickslides, the above is the expression...tI'm having trouble sorting thru..thanks much
Here's one I prepared earlier $\frac{3a^4b^3}{9a^4b^{-1}}-3$ first cancelling the coeff... | 4 | [
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0.0273... | 17,716 | 17716 | |
Troubling Trig Integral
March 28th 2010, 09:20 PM #1
Member
Joined
Feb 2010
Posts
76
Troubling Trig Integral
I am currently working on an integral that I finally found the answer to after approaching differently, but I would like to know why my first approach failed -- it led to undefined trig functions
... | 4 | [
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0.0130615234375,
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Normal probability distributions
May 12th 2007, 02:02 PM #1
Newbie
Joined
May 2007
Posts
8
Normal probability distributions
assume that men's weight are normaly distributed with mean 172 lb and a standard deviation 29 lb
If 100 men are randomly selected find the probability that weight of 10 of them ... | 5 | [
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Velocity and Acceleration
January 10th 2008, 12:21 AM #1
Newbie
Joined
Dec 2007
Posts
14
The distance traveled by a car in a time t seconds afer the brakes are applied is given by:
$y= 10t-1.8t^2$
Where y is the distance in metres and t is time in seconds.
Determine equations for velocity ... | 4 | [
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0.0354003... | 17,719 | 17719 | |
Statistics 1 - Line of Best Fit
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓ You can examine lines of best fit with:
┃ A line of best fit (or "trend" line) is a straight line that best represents the data on a ... | 4 | [
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m04q19- Six students study Russian, Ukrainian & Hebrew
Author Message
OldMinolta
Intern Re: 6 students in a group study different languages [#permalink] 25 Jun ... | 4 | [
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Finding the derivative
Find the derivative of the following from first principles: $<br /> x^3 + 2x<br />$
Very well... $f(x) = x^3 - 2x$ $f(x + h) = (x + h)^3 + 2(x + h)$ $f(x + h) - f(x) = x^3 + h^3 - 2x - 2h$ $= x(x^2 - 2) + h(h^2 - 2)$ Substituting into, $\lim_{h\to 0} \frac{f(x + h) - f(x)}{h}$, we
get: $\lim_{h\... | 5 | [
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0.09375,
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-0.0... | 17,722 | 17722 | |
proof involving natural numbers
How do I prove that N+ (positive natural numbers) are closed under multiplication? Any advice...Thanks in advance.
see here. what you want is on the last page. but the proof refers to things on previous pages.
We know there is a unique function $\cdot : \mathbb{N}\times \mathbb{N}\to \... | 4 | [
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-0.00823974609... | 17,723 | 17723 | |
Schwarz Reflection Principle for (Real) Harmonic Functions
February 13th 2013, 02:13 PM #1
Member
Joined
Sep 2009
Posts
75
Thanks
1
Schwarz Reflection Principle for (Real) Harmonic Functions
Assume $u$ is harmonic in $U^{+}$ and $u\in\mathscr{C}^{2}(\bar{U}^{+})$, where $U$ is the open ball $B_{1}(0)... | 4 | [
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... | 17,724 | 17724 | |
center of mass
June 5th 2007, 12:07 PM #1
Junior Member
Joined
Mar 2007
Posts
63
center of mass
Find Mx , My and (xbar,y bar) for the laminas of uniform density p bounded by the graphs of the equations.
5. y= sqrt(x), y=x
6. x= -y, x=2y, x= 0
$M = \iint_D dA = \int_0^1 \int_x^{\sqrt{x}} dy \... | 5 | [
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Need help taking partial derivatives
paul2001
Hello everyone,
I am trying to take partial derivatives of the following equation and I am having difficulties. The partial derivatives are of Q w.r.t D, ΔP, ρ, and w. Any help would be much appreciated. Thank you.
Paul
The function is
[tex]Q= 5.9863 CD^2\left[\frac{... | 5 | [
-0.000522613525390625,
0.05712890625,
0.1044921875,
0.00019550323486328125,
-0.03564453125,
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-... | 17,726 | 17726 | |
s
to the equation and solve--- the one i could do was--- F(k,l)='square root'of kl F(zK,zL)=Z'square root of K and L'
THANK YOU GREATLY------AND what would my other problem be--- F(K,L)= 'square root' of K + 'square root' of L
F(K,L) = 'square root' of KL = 'square root' of zK times zL = z times the square root of K... | 4 | [
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Some Results of Univalent and Starlike Integral Operator
Journal of Complex Analysis
Volume 2013 (2013), Article ID 502363, 3 pages
http://dx.doi.org/10.1155/2013/502363
Research Article
Some Results of Univalent and Starlike Integral Operator
^1School of Mathematical Sciences, Faculty of Science and Technology, The... | 5 | [
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Patent US6859622 - Predictive optimization of wavelength division multiplexed systems
FIELD OF THE INVENTION
The present invention relates to communication over optical fibers and, more particularly, to predictive optimization of wavelength division multiplexed systems.
BACKGROUND OF THE INVENTION
Optical networks, ... | 4 | [
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[A Trivial Problem] adj(AB) = adj(A)adj(B)
September 23rd 2008, 07:52 PM #1
Newbie
Joined
Dec 2007
Posts
4
[A Trivial Problem] adj(AB) = adj(A)adj(B)
Hi,
I want to know how to prove that adj(AB) = adj(B)adj(A), letting adj (A) be the adjugate matrix of A.
I feel the equation adj(A)A = |A|E does ... | 5 | [
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0... | 17,730 | 17730 | |
Limit of a sequence...
June 3rd 2009, 01:31 AM #1
Limit of a sequence...
Does the sequence...
$a_{n} = \frac{1}{\sqrt{n}}\cdot \sum_{i=1}^{n-1} \frac{1}{\sqrt{i+\alpha}}$ , $0<\alpha<1$ (1)
... have finite limit or not?...
I will appreciate very much an answer from you!...
Kind regards
$\... | 5 | [
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The union of finite subspaces
September 10th 2011, 09:02 AM #1
MHF Contributor
Joined
Mar 2010
From
Florida
Posts
3,093
Thanks
5
The union of finite subspaces
Let F be a an infinite field. Prove that a vector space, V, over F cannot be a finite union of proper subspaces.
I have already shown... | 5 | [
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0.... | 17,732 | 17732 | |
volume of rotation
March 18th 2007, 12:04 PM #1
Junior Member
Joined
Mar 2007
Posts
63
volume of rotation
Using the shell method, find the volume of the solid of revolution obtained by rotating the region bounded by y = x and y = x2 about the x-axis
<a> pi/2
<b>2pi/5
<c>pi/15
<d>2pi/5
... | 5 | [
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Am I doing This correctly?
June 12th 2008, 06:16 PM #1
Newbie
Joined
Jun 2008
Posts
6
Am I doing This correctly?
5x + 6y = 18 solve for y
5x - 5x + 6y = 18 + 5x
6y = 18 + 5x
6y/6 = 18 + 5x/6
y = 3 + 5x
This has 2 variables, do I need to solve for x or will y=3+5x work out?
When... | 4 | [
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check derivative
September 24th 2006, 01:24 PM
Mathman24
check derivative
Hi could somebody please look through my answer to his homework assigment .
Given $z = sin(x + sin(t))$
show that $\frac{\partial z}{\partial x} \cdot \frac{\partial ^2 x}{\partial x \partial z} = \frac{\partial z}{\partial t} \c... | 5 | [
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Needs some help with some calculus word problems
February 20th 2009, 03:14 PM #1
Newbie
Joined
Aug 2008
Posts
14
Needs some help with some calculus word problems
5. When powder or granular solids are piled up, the powder forms a conical pile. The edge of the pile reaches a certain maximum angle with the ... | 4 | [
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Vector image on another vector
Register to reply
by baby_1
Tags: image, vector
Hello
I want to demonstrate a equation of Vector image on another vector (A on B)
P: 74 $A_{B}=\fra... | 4 | [
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Differential Equations
August 6th 2009, 07:43 AM #1
Member
Joined
Jan 2008
Posts
132
Differential Equations
Hello!
Q: A population of animals live on an isolated island such that at any time, the number of births per unit time is proportional to the population and the number of deaths per unit time ... | 5 | [
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calculus application
October 30th 2006, 10:32 AM
bobby77
calculus application
At 2.00pm the speedometer of your car read 30km/hr.At 2.10pm it reads 50km/hr.show that at sometime between 2.00pm and 2.10pm the acceleration is exactly 120km/hr^2.
October 30th 2006, 12:06 PM
ThePerfectHacker
Quote:
Let,... | 5 | [
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Projectile motion problem where the projectile is a rocket
isTheReau
1. The problem statement, all variables and given/known data
A rocket is launched at an angle of 53° above the horizontal with an initial speed of 75 m/s. It moves in powered flight along its initial line of motion with an acceleration of 25 m/s^2.... | 4 | [
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... | 17,740 | 17740 | |
Mechanics, two questions
January 30th 2009, 09:48 AM #1
Newbie
Joined
Jan 2009
Posts
2
Mechanics, two questions
Q1-A truck with initial velocity 6 m/s^-1 brakes and comes to rest. At time t seconds after the brakes are applied with acceleration a m/s^-2 where a=-3t. This formula applies until the truck
... | 4 | [
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find the primitive root
July 21st 2006, 02:10 PM
kezman
find the primitive root
Let w, a 20th units primitive root.
Prove that
w + w^3 + w^7 + w^9
is a pure imaginary complex.
Im not sure how to "attack" this problem.
July 22nd 2006, 07:38 PM
ThePerfectHacker
Quote:
Originally Pos... | 5 | [
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Physics Forums - View Single Post - Lateral force of water on the walls of a tank
You have the total weight right, but you still aren't getting the lateral force right. At a given depth, the pressure on the wall at that point is:
[tex]P = \rho g h[/tex]
Where:
[itex]P[/itex] is pressure (force per area)
[itex]\rho[/i... | 5 | [
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Reflections - Kane's Book
March 30th 2012, 11:53 PM
Bernhard
Reflections - Kane's Book
I am reading Kane - Reflection Groups and Invariant Theory and need help with property A-4 of the properties of reflections stated on page 7
(see attachment - Kane _ Reflection Groups and Invariant Theory - pages 6-7)
... | 5 | [
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Patent US5010299 - Method for measuring stress on steel by determining the reverse magnetic permeability under a magnetic bias field
BACKGROUND OF THE INVENTION
The present invention relates to a method for the determination of stress applied to a steel material constituting a structural body in the fields of architec... | 4 | [
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Patent US6771699 - Method for rapid carrier-frequency offset acquisition using a periodic training sequence
BACKGROUND OF THE INVENTION
Rapid receiver training is key for the efficient design of many communication systems. For example for voiceband modems, rapid start-up is greatly desirable. In systems where burst-mo... | 4 | [
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Patent US6006196 - Method of estimating future replenishment requirements and inventory levels in physical distribution networks
FIELD OF THE INVENTION
This invention relates to the management of inventory in physical distribution networks. Specifically, the invention relates to a distribution logistics framework know... | 4 | [
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Find equation of Line where Plane Meets
February 25th 2011, 06:45 PM #1
Member
Joined
Apr 2009
Posts
87
Find equation of Line where Plane Meets
Find the equations for the line of intersctions of the planes:
x+y+z=1
x+y=2
I worked it out to be r(t)=3i-j-k+t(i-j)
The ans says:
r(t)=... | 4 | [
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-0.07177... | 17,748 | 17748 | |
trigonometric identities
Sin x/1-cosx=1+cosx/sinx I need to show that one equals the other by choosing one side to prove.
Hello and welcome, I wish to offer two friendly pieces of advice for future topics since you are new here: i) This is a trigonometry problem, so it should be posted in the trigonometry forum. This
... | 4 | [
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solving equations help
March 16th 2009, 05:44 AM #1
Super Member
Joined
Oct 2007
From
Santiago
Posts
517
solving equations help
given that $-\pi <= x <= \pi$
solve:
a) $cos^2x+cosx=0$
b) $2sin^2x - sinx = 0$
NOTE: <= (less than or equal to)
any help much appreciated!
c... | 4 | [
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-0.0281982421875... | 17,750 | 17750 | |
Arranging numbers in a circle
April 12th 2009, 09:13 AM #1
Newbie
Joined
Apr 2009
Posts
11
Arranging numbers in a circle
Here's a question I found from a Chinese book, (which contains no answers), and I found it to be very interesting.
Suppose we have $n$ numbers whose sum is 0.
Arrange them in ... | 5 | [
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Reinforcement Learning Ramp Metering without Complete Information
Journal of Control Science and Engineering
Volume 2012 (2012), Article ID 208456, 8 pages
http://dx.doi.org/10.1155/2012/208456
Research Article
Reinforcement Learning Ramp Metering without Complete Information
^1School of Traffic and Transportation, ... | 4 | [
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Finding the Derivative of the Given Function
I am having some difficulty finding the derivative of this equation: http://i49.tinypic.com/35jdoxt.png Can anyone assist me in solving this?
First, I would rewrite the function as \displaystyle \begin{align*} g(x) = \sqrt{10} \, \sqrt{x} \end{align*} and remember that the ... | 5 | [
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calculus proof
August 31st 2008, 12:25 PM #1
Newbie
Joined
Aug 2008
Posts
8
calculus proof
Hi, Ive been stuck on this proof problem for awile and was wondering if anyone has any ideas?
Integral (csc(x)) dx = ? expain how you get the answer.
**For example in Integral (sec(x)) dx:
Integral (... | 5 | [
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0.005523681640625,
-0... | 17,754 | 17754 | |
line integral of a shifted semi-circle
January 10th 2013, 01:15 AM
Kvandesterren
line integral of a shifted semi-circle
This problem is to find the line integral of a semi-circle, from (3,0) to (1,0), centered at (2,0) above the x-axis, y > 0. The vector field is (x i + y j)
I have calculated that the range... | 5 | [
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Math question
Author Message
TAGS:
I could figure this out by trying to divide each number by 990, but I am wondering if you guys know a shortcut.
If n is a positive integer and the product o... | 4 | [
0.041015625,
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Brevet US5594674 - Code point update device in the arithmetic coding method
This application is a continuation of application Ser. No. 08/216,743 filed Mar. 23, 1994 now abandoned.
DESCRIPTION
Priority of application Ser. No. 93-03589 filed on Mar. 29, 1993 in France is claimed under 35 U.S.C. §119.
1. Technical Fie... | 4 | [
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0.07275... | 17,757 | 17757 | |
Fermion oscillator
strangerep
No.
Consider a function f(x) where x is real. You wouldn't call "x" constant, even though any specific
value of x you plug into f(x) _is_ constant.
Ok. But then we need more precise definition for the set of allowed values of [tex]\theta[/tex]. It is not my intention to only complain... | 4 | [
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... | 17,758 | 17758 | |
i can't figure out how the teacher got 7x..please help
December 6th 2009, 08:12 AM #1
Junior Member
Joined
Sep 2009
Posts
49
ok so i got this question and i know how to slove it and everything but im lost as of where the teacher got this one number.. so here it is
(x+5)/(x-2) = 5/(x+2) + 28/(x^2-4)
... | 4 | [
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0.03466796875... | 17,759 | 17759 | |
Patent US6292525 - Use of Hilbert transforms to simplify image reconstruction in a spiral scan cone beam CT imaging system
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates generally to a cone beam computed tomography (CT) imaging system, and more specifically to a simplified method and appa... | 4 | [
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... | 17,760 | 17760 | |
Brevet US4498778 - High speed scanning method and apparatus
This application is a continuation-in-part of application Ser. No. 249,131, filed Mar. 30, 1981, now abandoned.
DESCRIPTION
1. Field of the Invention
The present invention relates, in general, to an improved method of determining the location of a sensed el... | 4 | [
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Physics Forums - View Single Post - An error related with matrix exponential
As a sidebar, it is important to know (at least when finding the root of a transition matrix) that if A= P'EP and B =R'SR where E and S are a diagonal matrix of eigenvalues. The P and R matrices are
composed of the respective eigenvectors, an... | 4 | [
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Performance Analysis Of A Variation Of The Distributed Queueing Access Protocol
Abstract (Summary)
"A distributed queueing Medium Access Control (MAC) protocol is used in Distributed Queue Dual Bus (DQDB) networks. A modified version of the MAC protocol was proposed by R.R. Pillai and U. Mukherji
in an attempt to ove... | 4 | [
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-0... | 17,763 | 17763 | |
More on Wilson and Fermat
July 23rd 2008, 08:16 AM #1
Newbie
Joined
Jul 2008
Posts
13
More on Wilson and Fermat
1. If n E Z n>1 . N is prime if and only if (n-2)!= 1 modn
2. Let n be composite and >4. Prove (n-1)! = 0mod n
3. Show that 11 divides 456^654 +123^321
4. Find the solution to 9x... | 5 | [
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A Number to a fraction of a power
Register to reply
by AZTarzan
Tags: fraction, number, power
P: 1 What is
125 to the power of 2/3
I think it is 1/125 or .008 but I'm not sure... | 4 | [
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prime subfield
March 7th 2009, 11:07 AM #1
Member
Joined
Sep 2008
Posts
166
prime subfield
Let $F$ be a field and let $E$ be the prime subfield of $F$. Prove that every automorphism of $F$ fixes $E$.
If $\sigma: F\to F$ is an automorphism then $\sigma (1) = 1$.
Let $n\cdot 1 = \underbrace{1 + 1 ... | 5 | [
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Unitary and triangular = diagonal matrix
April 13th 2009, 12:30 AM #1
Member
Joined
Mar 2009
From
Gold Coast, Queensland, Australia
Posts
105
Unitary and triangular = diagonal matrix
can anybody help me with this question?
Show that if a matrix A is both triangular and unitary, then it is diagon... | 5 | [
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-0.0... | 17,767 | 17767 | |
A Groupwise Association Test for Rare Mutations Using a Weighted Sum Statistic
Abstract
Resequencing is an emerging tool for identification of rare disease-associated mutations. Rare mutations are difficult to tag with SNP genotyping, as genotyping studies are designed to detect common
variants. However, studies have ... | 4 | [
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Surface Plasmon Singularities
International Journal of Optics
Volume 2012 (2012), Article ID 152937, 7 pages
http://dx.doi.org/10.1155/2012/152937
Research Article
Surface Plasmon Singularities
^1Departamento de Óptica, Instituto Nacional de Astrofísica Óptica y Electrónica (INAOE), Apdo. Postal 51 y 216, Tonantzint... | 4 | [
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-0.03369140625,
-0... | 17,769 | 17769 | |
Particle Production in Strong Electromagnetic Fields in Relativistic Heavy-Ion Collisions
Advances in High Energy Physics
Volume 2013 (2013), Article ID 490495, 34 pages
http://dx.doi.org/10.1155/2013/490495
Review Article
Particle Production in Strong Electromagnetic Fields in Relativistic Heavy-Ion Collisions
Depa... | 4 | [
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0.03039550... | 17,770 | 17770 | |
finite fields
September 3rd 2010, 07:35 AM
ulysses123
finite fields
Let F=(Z₃[x])/<x²+1>
Calculate (x + 1)⁴ in F. Explain why your calculation shows that F* is cyclic
I have calculated (x + 1)⁴and then divided the result by x^2+1 which gives me x+2
I am not sure if i have done this correctly and i ... | 4 | [
-0.04296875,
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A Bayesian Hierarchical Model for Relating Multiple SNPs within Multiple Genes to Disease Risk
International Journal of Genomics
Volume 2013 (2013), Article ID 406217, 10 pages
http://dx.doi.org/10.1155/2013/406217
Research Article
A Bayesian Hierarchical Model for Relating Multiple SNPs within Multiple Genes to Dise... | 4 | [
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proof uniform distribution
1. Let $X = U + 1$. The cdf of X is given by $F(x) = \Pr(X < x) = \Pr(U + 1 < x) = \Pr(U < x - 1) = \int_{0}^{x - 1} 1 \, du = \, ....$ Therefore the pdf of X is given by $f(x) = \frac{dF}{dx} = \,
....$ for $1 \leq x \leq 2$ and zero elsewhere. -----------------------------------------------... | 5 | [
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Find the 2013-th
Let $N=1+10+10^2+...+10^{4023}$. Find the 2013-th digit after the decimal comma of $\sqrt N$
If you try to the add the terms you will notice that you will get a long string of 1's. so you will find, $N=\underbrace{1111....1111}_\text{4024 1's}$ let $2n=4024$ now $9N<10^{2n} \implies 9N^2<10^
{2n}N \im... | 5 | [
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... | 17,774 | 17774 | |
URGENT, NEEDED BY 3:30! Power Series and error.
May 3rd 2008, 10:40 AM #1
Newbie
Joined
Feb 2008
Posts
22
URGENT, NEEDED BY 3:30! Power Series and error.
I was having trouble with this problem:
Use a power series to approximate the value of the integral with an error less than 0.0001. Assume that th... | 5 | [
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... | 17,775 | 17775 | |
2-dimensional integral
January 21st 2009, 06:06 AM #1
Member
Joined
Sep 2006
Posts
77
2-dimensional integral
Region A is the area between the unit circle and the circle of radius 2, in the top right quadrant only. Find
$\int_A{xy}~dA$
Ok so that's the question. We're doing the theory behind cha... | 5 | [
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... | 17,776 | 17776 | |
Neimark-Sacker bifurcation
From Scholarpedia
Yuri A. Kuznetsov and Robert J. Sacker (2008), Scholarpedia, 3(5):1845. doi:10.4249/scholarpedia.1845 revision #91556 [link to/cite this article]
Neimark-Sacker bifurcation is the birth of a closed invariant curve from a fixed point in dynamical systems with discrete tim... | 4 | [
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question on outward flux (Vector calc.)
April 19th 2009, 09:20 PM
htata123
question on outward flux (Vector calc.)
Hi,
I need help with this question;
Find the outward flux of the vector field F = <y,x,-z> through the boundary of the solid inside the cylinder (x^2) + (y^2) = 4 between the plane z = 0 a... | 4 | [
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-0.022827148437... | 17,778 | 17778 | |
Physics Forums - View Single Post - Symmetery of a finite sequence of numbers
SteveL27
Can you back up to the beginning and help me to understand your notation?
What's the sequence for the even numbers? What's the sequence for the primes? I think if you can simply show a couple of examples, we can help sort out th... | 4 | [
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-0... | 17,779 | 17779 | |
Math Help
February 20th 2009, 02:15 AM #1
Newbie
Joined
Jul 2007
Posts
5
9^103
Find the sum of the last 2 digits of 9^103
What is the product of the last 2 digits of 2004^2004
What other ways to do these besides Euler's theorem and finding the pattern?
if you use factorials for (a-b)^103 ... | 4 | [
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0.0033874511718... | 17,780 | 17780 | |
Solving Trig Equations
February 25th 2009, 03:02 PM #1
Junior Member
Joined
Feb 2009
Posts
64
Solving Trig Equations
I'm about done all my homework for this unit, but I seem to be stuck on my last 2 questions....any help would really be appreciated.
Solve each equation:
a) 2cos^2x + 3cosx -2 = 0... | 4 | [
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... | 17,781 | 17781 | |
[SOLVED] Proof of Propositions
March 26th 2009, 02:08 AM #1
Newbie
Joined
Mar 2009
Posts
1
[SOLVED] Proof of Propositions
what is the best way tp approach a proof based on contradiction for the proposition
(( p=> q)^ ~q) => ~p
I would like to learn how best to atack a problem like this - ideall... | 5 | [
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0.068359375,
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0.08203125,
0.068359375,
0.01226806640625,
0.044921875,
-0.04272460937... | 17,782 | 17782 | |
Patente US7778211 - Method for computing a downlink beamforming weighting vector based on up link channel information
CROSS REFERENCE
The present application claims the benefit of U.S. Provisional Application Ser. 60/847,181, which was filed on Sep. 26, 2006.
BACKGROUND
The computation of a downlink (DL) beamforming... | 4 | [
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0.078125,
0.034912109... | 17,783 | 17783 | |
find minimum possible value..
August 11th 2009, 09:50 PM
nh149
find minimum possible value..
can anyone help me with this problem?
find the minimum possible value of x^2 + y^2 given that x,y are real numbers such that
xy(x^2 - y^2 ) = x^2 + y^2 , x is not equal to 0.
thanx(Talking)
August 12th 200... | 5 | [
0.0103759765625,
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-0.0... | 17,784 | 17784 | |
(MangoMan) on PaGaLGuY
@MangoMan 6
Posted 04 Nov '09
Hi Guyz, the following set is the one which appeared in AIMCAT1003. Please suggest an alternative method to solve it. *Sixty-four players seeded from seed 1 to seed 64 participated in a knock-out
tennis tournament. Seed 1 is the highest seed and seed 64 is the l... | 4 | [
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0.0317382812... | 17,785 | 17785 | |
Proving Fermat's Little Theorem
June 5th 2009, 09:28 PM #1
Newbie
Joined
May 2009
Posts
11
Proving Fermat's Little Theorem
Hi there,
I have been trying to prove Fermat's little Theorem $n^x-n$ is divisible by x when x is a prime number) by using mathematical induction and without using modular arith... | 5 | [
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... | 17,786 | 17786 | |
Efficiency of an ideal-gas cycle.
Redbelly98
You'll need W for the complete cycle, the tricky part is the adiabatic leg. Can you set up the integral for that part and show what you get? Here is an integral sign you can copy-and-paste: ∫
You'll also need Q for one leg of the cycle (do you know which leg that is?).
... | 4 | [
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0.0... | 17,787 | 17787 | |
Math Help
October 19th 2013, 01:50 PM #1
Newbie
Joined
Oct 2013
From
Florida
Posts
6
Percents?
Okay, this might be pretty basic, but I am in the process of approximating the percent error in computing the area of a square. One of the square's side is 19 cm and has a possible error of 0.05
cm.
... | 5 | [
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... | 17,788 | 17788 | |
Finding roots in a + ib form
May 14th 2010, 04:37 PM #1
Junior Member
Joined
Apr 2010
Posts
43
Finding roots in a + ib form
Express the following in the form
a + ib. Give all values and make a polar plot of
the points or the vector vectors that represent your result.
(a) (9i)^(1/2)
is t... | 5 | [
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-0.103515625,
-0.0152587... | 17,789 | 17789 | |
Intergration Question (fairly basic)
May 18th 2009, 12:11 AM
Peleus
Intergration Question (fairly basic)
$\int(e^x - 3)^2 dx$
I think it goes as following, here is my working.
$\int (e^{2x} - 6e^x + 9) dx$
$= \frac{e^{2x}}{2} - e^x + 9x$
Can anyone confirm or tell me where I've gone wrong? T... | 4 | [
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Patente US4937763 - Method of system state analysis
BACKGROUND OF THE INVENTION
Very large, dynamic and complex industrial systems, such as electric power generating plants, petrochemical refining plants, metallurgical and plastic forming processes, etc., have hundreds if not
thousands of individual process parameters... | 4 | [
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-0.... | 17,791 | 17791 | |
Setting up equations to solve worded problems #2
September 12th 2009, 05:45 PM #1
Junior Member
Joined
Feb 2008
From
Singapore
Posts
44
Setting up equations to solve worded problems #2
I have like a few really basic but idontknow how to solve questions. hope someone can help! thanks in advance! ^^
... | 4 | [
0.059326171875,
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-... | 17,792 | 17792 | |
Using Excel to compute the binomial distribution.
Frequently Asked Questions
Using Excel to compute the binomial distribution.
FAQ# 1311 Last Modified 1-January-2009
The exact binomial distributionWhat is the chance of exactly 16 heads out of 20 tosses?
If we assume that the coin toss is fair and the results are re... | 5 | [
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... | 17,793 | 17793 | |
combinations proof
June 4th 2009, 01:35 AM #1
Junior Member
Joined
Oct 2008
From
Brisbane
Posts
25
combinations proof
To prove a combinations equality:
(n+2 C r+1) = (n C r+1) + 2 (n C r ) + (n C r-1)
-> (n+2 C r+1) = (n+2)! / (n+2 - (r+1))! (r+1)!
-> (n C r+1) = n! / (n - (r+1))! (r+1... | 4 | [
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Probabilistic inventory models
May 12th 2009, 08:58 PM #1
Newbie
Joined
May 2009
Posts
2
Probabilistic inventory models
The campus bookstore must decide how many textbooks to order for a course that will be offered only once. The number of students who will take the course is a random variable D whose di... | 4 | [
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basic logarithm problem
March 16th 2008, 06:58 PM
cbbplanet
basic logarithm problem
Hi, I just don't get this sort of Logarithm problems that have same two variable in the equation.
The problem is:
Solve for x
log x + log(x+3)=1
thanks for the help =]
March 16th 2008, 07:02 PM
TheEmptySet
... | 4 | [
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... | 17,796 | 17796 | |
determine equilateral triangle's length using a point from the inside
December 6th 2010, 12:54 AM #1
Newbie
Joined
Dec 2010
Posts
5
determine equilateral triangle's length using a point from the inside
Problem:
A point P within an equilateral triangle has a distance of 4, 5, and 6 units respectively ... | 4 | [
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Summary: 18.014ESG Problem Set 8
Pramod N. Achar
Fall 1999
Monday
1. Suppose f : [a, b] R is continuous; furthermore, suppose that it is
differentiable on (a, b). Show that if Df(x) > 0 for all x (a, b), then
f is strictly increasing. (Hint: If f were not strictly increasing, use the
Mean-Value Theorem to find a point... | 4 | [
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Math Help
May 19th 2007, 05:20 PM #1
Newbie
Joined
May 2007
Posts
10
functions
am having some problems with these equations
given tha f and g are functions where the target set and source sets are the set of real numbers and
f(x) = 10-3x
g(x) = 2
1+3
calculate
i) f(2)
ii)... | 4 | [
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