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 
121,292 
Please post any and all homework or other textbookstyle problems in one of the Homework & Coursework Questions...

Feb2313 09:24 AM
micromass

1 
25,873 
hello i need help with this,
what is the differential equation for the voltage v2 (t).
...

May712 12:25 PM
ShamelessGit

6 
2,893 
I have a perfectly working 2D finitedifference thermal solver, using an alternatingdirection implicit scheme...

May1812 07:02 AM
vagantes

5 
3,244 
Basically where are nonlinear dynamics and chaos theory used in the real world? Like if someone studies it what type...

May1312 12:57 PM
jackmell

8 
2,629 
Hi,
I am currently confused about something I've run across in the literature.
Given that
\nabla^2\phi =...

May1212 10:32 PM
yus310

1 
1,602 
Hi!
Probably I am just confused, but why for the exact solution of the geometric brownian motion dX_t = \mu X_t...

May412 03:18 AM
Tilde90

2 
2,005 
I have this solution that I don't quite understand
d(ro*pi*D^3/6)/d(t)=kr*Cao*pi*D^2
from here I would have...

May312 03:19 PM
tinytim

1 
2,197 
My DE is
\frac{h^2}{2m} \frac{d^2\psi}{dx^2} + \left(E  \frac{Ae^{ax}}{x} \right) \psi = 0
where h, m, A < 0...

May312 04:00 PM
claret_n_blue

0 
1,061 
Can we say that the boundary integral conditions= the nonlocal boundary condition?!!

May412 02:13 PM
mathmai

2 
1,506 
The Wikipedia page for "RungeKutta methods" gives the following example:
y' = tan y + 1
y(1) = 1
t in
Using...

May712 05:51 PM
honglin

0 
1,514 
can check the pdf :
EXISTENCE OF SOLUTIONS FOR QUASILINEAR PARABOLIC
EQUATIONS WITH NONLOCAL BOUNDARY CONDITIONS:...

May612 05:17 AM
mathmai

0 
993 
Hi,
I'm new to differential equations and I am wondering if I solved this one correctly or if it's entirely wrong....

May712 07:20 AM
JJacquelin

1 
1,095 
Hello
Comming from Discrete Mathematics, I have very little knowledge in Solving ODEs:
I have the following...

May1012 03:45 AM
JJacquelin

2 
1,355 
Hi,
I need help with a difficult differential equation. The following is the differential equation for a beam on a...

May2112 01:38 AM
hushish

26 
4,029 
Hi, I am a master student comes from USM in Malaysia. My main focus is on monopole instanton solution in static form...

May912 08:12 AM
tiantsai

0 
1,060 
Hi, I'm not sure if this is on the right thread but here goes. It's a perturbation type problem.
Consider the...

May1112 10:36 AM
pasmith

2 
1,279 
I got some questions about this topic...
y'' + p(z)y' + q(z)y=0
where y (and its derivatives) is a function of z,...

May1312 12:40 PM
Tosh5457

3 
1,426 
My math is a little rusty  so please bear with me if this is a stupid question.
I know how to solve both...

May1312 11:12 PM
Charles49

1 
987 
Is it possible to solve the following differential equation analytically?
y''(x) = A  B
where A, B and C are...

May1512 07:08 AM
HallsofIvy

1 
1,365 
Hello, new to the site and new to DE's. Quick question, I've started doing some selfstudy in linear ODE's and am...

May1512 07:00 PM
StationZero

5 
1,479 
Hi everyone,
So I was trying to calcule the Fourier Series of x(t) = cos4t + sin8t, but I'm a little bit confused....

May1612 12:37 PM
theorem4.5.9

3 
1,273 
Hi everyone,
I'm trying to solve an exercise in which I need to find x(t) considering that X(ω) = cos(4ω). So, I...

May1612 12:34 AM
helderdias

0 
965 
Hi,
Can somebody help me solve the following PDE?
∂p(x,t)/∂t = p(x,t) + ∫λ(xx')p(x',t)dx'
with p(x,0)=δ(x)...

May1712 05:46 PM
hunt_mat

2 
1,104 
I have nonlinear system of ordinary differential equations to solve by first linearising it. I know it can be...

May2112 01:43 PM
Vargo

2 
1,441 
Differentiate y = ln(x^{2} + sin x)exp^{4xcos(x)} (2x + 1)^{8}
Thanks in Advance for Your Help

May1712 02:01 AM
tinytim

1 
1,215 
Hello all,
I am attempting to characterize a molecular pathway through a system of difference equations:
W = W ...

May1612 06:07 PM
DAVA

0 
1,232 
hey, can someone explain to me how mathematicians found out that for second order homogenous ODEs with constant...

May2612 08:00 PM
algebrat

2 
1,795 
Im trying to solve ot for my thesis but i cant seem to find the answer:
dx/dt = 2a²*x(t)²  2b*x(t)  c²(y)t
...

May1812 06:57 AM
jackmell

1 
1,302 
Let us take a function defined by
y=cx
To differentiate that, we use the operator d/dx
\frac{d}{dx} y =...

May1912 09:27 PM
NanoPassion

3 
1,206 
Dear Sirs, How to include the coupling coefficient of coupled mode equation in linear operator (or where ever it...

May2112 11:51 PM
joshvaraj

0 
1,063 
I've completed my Engineering but doing a self study course in Dynamics of Structures and have got a very fundamnetal...

May2312 12:39 AM
yus310

4 
1,407 
Consider the linear differential equation below:
Lu=\lambda u
With L a hermitian operator.
We know that the...

May1912 02:01 PM
Shyan

2 
1,168 
Help pls decide this Differential Equations!I did not coincide with the answer and in some no idea how to do! will be...

May2212 06:34 PM
haruspex

4 
1,142 
Problem: Solve the initial Value:
when x=1, y=0
dy/dx = 1
2x^2(d^2y/dx^2) + 3x (dy/dx)  15y = 0
My attempt:
...

May2512 09:21 AM
HallsofIvy

13 
2,439 
Hey guys, I'll take ordinary differential equations this summer. Class starts on June 4th. I wanted to get a head...

May2112 09:56 PM
jean28

0 
952 
Hi,
Just wanted to verify my process to complete the Fourier series in complex form.
With the Function
f(t) = 8,...

May2312 10:35 AM
JamesEllison

0 
1,209 
Hey,
I need your help to solve the following set of coupled differential equations numerically.
...

May2812 06:30 PM
hunt_mat

5 
2,575 
I tried to solve it but confused. Pls. help me to solve this equation:
dy/dx + (e^x)*Sec(y) = Tan(x);
(hint:...

May2212 04:40 PM
jackmell

3 
1,223 
like for example if we had a 2nd order differential equation
is it possible that we can have more than 2 nontrivial...

May2312 05:47 PM
AlephZero

3 
1,529 
Dear Friends
i am trying to solve two first order differential eqs. with one algebraic eq.
i am able to get...

May2712 06:26 PM
rickyvery

2 
1,468 
I'm trying to write a code to implement he backwards Euler method to integrate the equation of motion. The sticking...

May2612 08:04 AM
AlephZero

2 
1,362 