
My intent is to create a thread for people interested in Differential Equations. However, I will explicitly state that...

Jul312 07:18 PM
Luccas

95 
138,495 
Please post any and all homework or other textbookstyle problems in one of the Homework & Coursework Questions...

Feb2313 09:24 AM
micromass

1 
30,172 
Explain differential equation of order 3? With example?

Nov2608 05:02 AM
HallsofIvy

1 
1,075 
Hello
Don't think this is homework, because I just want to know whether or not it has a solution
(x^2 + x + 1)y''...

Apr2511 04:28 AM
JJacquelin

5 
1,075 
Hello everyone,
I am solving an eigenvalue problem. Right now, I would like to know;
How to determine the...

May2311 06:05 PM
Urkel

0 
1,075 
Hi,
I want to solve the following wave equation:
u_{tt}  c^2 u_{xx} = f(x,t)u
What is the best way to do it?...

May2811 11:00 AM
Tohiko

2 
1,075 
Hi friends.
I am working on Neighborhood Filters and the NLmeans algorithm but it's not going for me.
I got...

Jan2312 12:51 PM
parazit

0 
1,075 
I've been trying (unsuccessfully!) to rearrange the following equation so that H is the subject:
mgH = / 2
...

Mar2410 10:24 PM
hotvette

1 
1,073 
I am solving a problem involving Lagrange Multipliers and calculus of variations and have the equation:
f_{x} ...

Feb112 04:45 PM
shank8

0 
1,073 
Haiya :P
In the process of trying to find the solution of a 1st order PDE, I've reached a point where I have to...

Sep2909 05:02 AM
BobbyBear

5 
1,072 
Hey guys,
I have a pretty simple question but I can't seem to find the answer anywhere.
is
y''+xy'5=(x^2)(e^y)...

Jan2210 09:07 AM
matematikawan

2 
1,072 
so im working on a problem and i have a question about the step function. lets say that a decaying force is f(t). with...

Nov2211 12:49 AM
I like Serena

1 
1,072 
Hello guys,
Which method can we use to solve the differential equation below?
dy/dx= 1/(xy+x^2y^3)
It doesn't...

Apr705 09:07 PM
Lyuokdea

5 
1,071 
Hi Everyone,
Apologies if this is posted in the wrong place.
I am trying to produce numerical solutions for the...

Jan2511 10:37 AM
rs12345

0 
1,071 
Hello,
What does laplace transformation exactly 'do'? If I have PDE of second order and use LT on it, what do i...

Dec411 05:02 PM
hunt_mat

1 
1,071 
I'm having trouble understanding the concept of laplace transformations.
my book states that it is comparing how...

Apr2605 09:04 PM
Corneo

1 
1,070 
Ok, I know how to separate variables in solving an ODE. I am unable to understand a solution I have for a problem...

Jul1312 06:29 PM
ericm1234

2 
1,070 
I don't understand what my professor told me. He said that if a fourieer series of a function f is not continuous then...

Dec809 11:13 PM
LCKurtz

4 
1,069 
Can anyone tell me if this ODE has an analytic solution? And if it does, how the heck might I go about it?
...

Dec1010 06:46 AM
JJacquelin

4 
1,069 
I'm trying to solve this equation:
Ux + Uy + U = e^(x+y) with the initial condition that U(x,0)=0
I played...

Apr1210 08:09 PM
gato_

2 
1,068 
Hi all,
I'd like to solve the following problem in 3 dimensions:
\partial_t u(r,t) = D\Delta u(r,t)
u(r,0) = 0...

Jul2613 12:18 PM
mfb

3 
1,068 
I'm studying linear elasticity and I came across an equation that I having problems figuring out the derivation. I...

Sep913 10:09 PM
Chestermiller

10 
1,068 
I am trying to solve an ODE and PDE and I am having problems coming up with a method for doing so.
The PDE is:
...

Jun3013 07:53 AM
dm164

5 
1,067 
can any one know how to derive the Lax pair for the cubic nonlinear schrodinger equation?
currently I am interested...

Mar1611 07:23 AM
saravanan13

0 
1,067 
Is this problem possible?
Solve the initial value problem
x''(t) + 6x'(t) + 9x(t) = f(t); x(0) = N, x'(0) = M
...

May1811 04:35 AM
JJacquelin

1 
1,067 
Having a bit of trouble with this equation, I need to find V explicitly and this would obviously be done by...

Apr2812 08:40 AM
JJacquelin

5 
1,067 
Hi friends,
I have been trying to solve the ode of second degree below:
d2y/dz2=(i/a*z+b)*y
i is the complex...

Oct1811 06:43 PM
bloodlines

4 
1,066 
Hello,
I am trying to write a program on matlab using ode45 to solve the following equations:
S'=bSZsS...

Aug2611 11:21 PM
klinklindeman

0 
1,066 
I was going through my notes on different finite difference methods and came across something I don't quite...

Feb2612 11:54 AM
O_chemist

0 
1,066 
I would like to ask if anybody knows something about the methods of solving infinite linear autonomous systems of...

Jul3113 12:01 PM
Mandelbroth

3 
1,066 
For a general dynamic system: dXi/dt = Fi(X1, X2,...,Xn), i=1,...,n,
Q.1
do you have some ideas of the existence...

Jun2911 01:36 AM
Eynstone

1 
1,065 
Eq
u'(x)+p(x)u=f(x)
with initial condition u(0)=0
It's homogenous solution is
u_h=Ce^{\int^x_0 p(s)ds}

Jan712 05:14 PM
matematikuvol

3 
1,065 
Hello guys, I am new here to the forum and I was wondering if you could help me with some trouble I am having with...

Oct2910 11:56 AM
Funzies

2 
1,064 
Hi everyone,
I have an equation that contains the derivative of the Bessel Function of the first kind. I need to...

Nov1912 07:26 AM
KyleS4562

2 
1,064 
Hello,
In my Differential Equations class we are learning about modelling with first order differential equations....

Sep2813 02:55 AM
UltrafastPED

3 
1,063 
Can anyone help me with a simple algorithm or code for a Finite difference Time domain scheme to implement in Matlab....

Jun3008 01:23 PM
chitambira

0 
1,062 
So this question pertains to some process engineering homework i have, which is basically the following:
I have an...

Feb509 12:09 AM
matematikawan

1 
1,062 
There seems to be something wrong with the LaTeX
This seems like an absolutely trite question, but I can't seem to...

Jun309 06:26 PM
dev00790

1 
1,062 
Hi I have been trying to figure out how this method works.
Searched the forum but got no results. Have attached an...

May1510 11:40 AM
LCKurtz

3 
1,062 
Hello all,
During the course of a calculation I was doing for my research, I derived a delay integral equation of...

Jul1510 02:58 PM
Mute

2 
1,062 
Hello all,
I am trying to solve the FPE in 2D,
The equation is (with implied summation over repeated indices):...

Aug2112 02:59 PM
sokrates

0 
1,062 
I'm trying to solve the heat conduction formula in 3 dimensions when there is constant generation from electrical...

Feb113 01:03 PM
pasmith

2 
1,062 