
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 
138,162 
Please post any and all homework or other textbookstyle problems in one of the Homework & Coursework Questions...

Feb2313 09:24 AM
micromass

1 
30,032 
im looking for an exact analytical solution for the following
(1/alpha) * dT/dt = d2T/dr2 + (1/r)*dT/dr
where d...

Feb810 06:05 AM
gato_

20 
3,998 
I'm almost finished my calculus book (I'm selfteaching) and in the last 2 chapters it's giving a brief intro to...

Feb110 08:37 AM
omenka

6 
2,757 
hello...
Can anyone tell me how can I simulate the laser rate equation with matlab? i allready wrote a code whics...

Feb310 03:16 PM
katla

21 
18,058 
Legendre equation:
(1x^2)y''2xy'+n(n+1)y=0 Where 1< x < 1
General solution is y(x)=c_1 P_n (x)+c_2 Q_n (x)
...

Feb310 11:21 AM
yungman

14 
2,740 
Hello friends please attached file to see my problem

Jan2610 04:06 PM
alokgautam

4 
2,832 
This is really difficult for me(at least for me), though it seems simple!
Could anyone help me to solve it or give...

Jan2610 07:25 AM
hyime

6 
1,464 
There is a linear version of socalled lattice Schrodinger equation (LSE), it is just a variation form of nonlinear...

Jan2710 10:46 AM
elibj123

1 
804 
I have problem understand in one step of deriving the Legendre polymonial formula. We start with:
P_n...

Jan2910 07:08 PM
yungman

2 
2,395 
Y=a+b
because Y,aa+Y,bb=0

Feb610 05:52 PM
torquil

1 
1,020 
Hi
Most of my work in the past has been on 1D independent particle systems where I use matrix diagonalisation to...

Jan2810 02:10 PM
elibj123

1 
5,423 
Can anyone help me to solve the PDE via Inverse Scattering transform method?

Feb410 04:19 PM
kurniliya

1 
1,143 
I have a set of ten dependent variables x1, x2 ... x10 and an independent variable t. The differential equations are...

Jan2910 09:13 AM
rkrsnan

1 
3,795 
Hi,
I'm looking for a solution to
u_t + A u_x + B (u  f) = 0
where f is a given function linear in x and...

Jan3010 08:13 AM
Tunneller

2 
1,432 
I was stuck on a problem in my Diff Eq book and I asked my teacher for some guidance. This was the problem:
Let M...

Jan3010 11:49 AM
farleyknight

0 
810 
We would like to invite anyone with an interest in ordinary differential
equations (ODE) teaching and research to...

Jan3010 07:23 PM
palais

0 
981 
whenever i see that integrating factor for solving a linear differential equation with
eint. p(x) dx and then...

Jan3110 10:30 PM
bennyska

2 
1,125 
So I've always done simple ODEs by the method of separation of variables. You know,
dy/dx = A*y
dy/y = A*dx...

Feb210 09:41 PM
LCKurtz

2 
2,442 
I am not interested in the solution, but I am curious what makes: uiv = u, a 4thorder ordinary differential equation....

Feb410 11:50 AM
torquil

8 
1,759 
Hello everyone!
Having a field \bf B = \nabla \times \bf A , how is it possible to get \bf A ?
For constant...

Feb210 06:05 AM
Phrak

5 
4,980 
ive been given this question for a uni assignment:
given the function:
f (x) = 5(x^1.3) +1.5(7x − 3)+ 3(e^− x) +...

Feb810 02:38 PM
alsatron

2 
6,988 
Hello dear friends,
I have this PDE
Can anyone help me in finding what type PDE is it. So that I can try to...

Feb1110 12:44 PM
kosovtsov

7 
1,862 
Hi could someone please explain how this can be done please
1.
The population P satisfies the differential...

Feb410 03:21 AM
elibj123

1 
867 
Hello,
I have a inverse Laplace transform problem: F(s)=1/s^2*exp. I tried some ways but didn't find right answer....

Feb410 07:20 AM
luhug2

0 
997 
I am trying to solve
(1) U_t = 2bU_xy (as part of U_t = aU_xx + 2bU_xy + cU_yy)
using centred finite difference...

Feb1010 11:38 AM
RedBranchKnight

0 
1,021 
I have to set up a differential equation for a leaking cylindrical container that is being refilled at a constant...

Feb710 02:46 PM
torquil

3 
2,161 
Hello everyone and thanks for looking at my thread,
I had some trouble solving this ODE which was in a textbook by...

Feb1010 10:29 AM
IttyBittyBit

2 
901 
My professor yields this equation. d^2z/d0^2+1=0. This problem has to do with heat conduction. So a plane sheet...

Feb1010 02:36 AM
torquil

1 
4,742 
d20/de2+1=0 and the boundry condition is d0/de(evaluated at e=+/ 1)=+/H0(evaluated at +/1). The final result...

Feb810 12:00 AM
juice34

0 
992 
The claim is: Δu≤ sqrt(n)D^2(u)
where we regard Du as a gradient vector and we regard the elements of D^2(u) as...

Feb810 01:14 AM
RAT(16am

0 
1,041 
Hello,
I'm having problems with a D.E. question,
I'm asked to solve the equation:
\left(1+y^{'2}\right)y=k^{2}...

Feb910 03:57 AM
gato_

1 
1,737 
What is the meaning of \;\;\frac{\partial u}{\partial t}(x,0)
Is it equal to \;\;\frac{\partial u(x,t)}{\partial...

Feb1110 09:37 AM
Lord Crc

3 
1,341 
In am studying PDE and I have question about D'Alembert solution for one dimension wave equation.
I am going to...

Feb1610 11:47 AM
yungman

7 
3,178 
i need to solve the follow diferential equation:
(\frac{du}{dy})^2=A+Be^{2u}+C \sqrt{D+Ee^{4u}}
where A,B,C,D,E...

Feb1610 09:07 AM
alejandrito29

6 
1,018 
I want to write a program in C that's going to solve 3 second order differential equations, and I have little to no...

Feb1310 02:29 PM
WraithM

4 
2,249 
LaTex Code: \frac{\partial U}{\partial t} + ax\frac{\partial U}{\partial x} + b\frac{\partial^2 U}{\partial x^2} = 0
...

Feb1210 12:17 PM
kosovtsov

1 
1,991 
I've come across a very ambiguous statement in my notes on implicit functions (part of the partial derivatives part of...

Feb1310 04:48 PM
raymo39

8 
2,987 
Hi,
I have an excel spreadsheet that calculates the pressure inside a piston chamber, that is a function of time. I...

Feb1510 10:53 AM
a.mlw.walker

7 
1,304 
When you study physics, you never really delve into the reasons behind some of mathematical identities, i was curious...

Feb1410 01:35 PM
elibj123

1 
1,049 
Hi there, could anyone help me on this particularly frustrating problem I am having... I have a linear parabolic...

Feb1610 03:29 AM
nixs

0 
2,034 
Hello Everyone trying to come up with a stratagey to solving this integral
Int(x^3*J3(x),x) no limits
Ive tried...

Feb1610 08:44 PM
Astronuc

2 
1,466 