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Differential Equations

- An equation involving derivatives of a function or functions. Solving ODE and PDE
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Jan16-12 Greg Bernhardt
My intent is to create a thread for people interested in Differential Equations. However, I will explicitly state that...
Jul3-12 07:18 PM
Luccas
95 138,488
Please post any and all homework or other textbook-style problems in one of the Homework & Coursework Questions...
Feb23-13 09:24 AM
micromass
1 30,171
hello i need help with this, what is the differential equation for the voltage v2 (t). ...
May7-12 12:25 PM
ShamelessGit
6 3,191
I have a perfectly working 2-D finite-difference thermal solver, using an alternating-direction implicit scheme...
May18-12 07:02 AM
vagantes
5 3,572
Basically where are nonlinear dynamics and chaos theory used in the real world? Like if someone studies it what type...
May13-12 12:57 PM
jackmell
8 2,799
Hi, I am currently confused about something I've run across in the literature. Given that \nabla^2\phi =...
May12-12 10:32 PM
yus310
1 1,747
The Wikipedia page for "Runge-Kutta methods" gives the following example: y' = tan y + 1 y(1) = 1 t in Using...
May7-12 05:51 PM
honglin
0 1,614
can check the pdf : EXISTENCE OF SOLUTIONS FOR QUASILINEAR PARABOLIC EQUATIONS WITH NONLOCAL BOUNDARY CONDITIONS:...
May6-12 05:17 AM
mathmai
0 1,028
Hi, I'm new to differential equations and I am wondering if I solved this one correctly or if it's entirely wrong....
May7-12 07:20 AM
JJacquelin
1 1,158
Hello Comming from Discrete Mathematics, I have very little knowledge in Solving ODEs: I have the following...
May10-12 03:45 AM
JJacquelin
2 1,420
Hi, I need help with a difficult differential equation. The following is the differential equation for a beam on a...
May21-12 01:38 AM
hushish
26 4,372
Hi, I am a master student comes from USM in Malaysia. My main focus is on monopole instanton solution in static form...
May9-12 08:12 AM
tiantsai
0 1,128
Hi, I'm not sure if this is on the right thread but here goes. It's a perturbation type problem. Consider the...
May11-12 10:36 AM
pasmith
2 1,366
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,...
May13-12 12:40 PM
Tosh5457
3 1,549
My math is a little rusty - so please bear with me if this is a stupid question. I know how to solve both...
May13-12 11:12 PM
Charles49
1 1,051
Is it possible to solve the following differential equation analytically? y''(x) = A - B where A, B and C are...
May15-12 07:08 AM
HallsofIvy
1 1,438
Hello, new to the site and new to DE's. Quick question, I've started doing some self-study in linear ODE's and am...
May15-12 07:00 PM
StationZero
5 1,615
Hi everyone, So I was trying to calcule the Fourier Series of x(t) = cos4t + sin8t, but I'm a little bit confused....
May16-12 12:37 PM
theorem4.5.9
3 1,351
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...
May16-12 12:34 AM
helderdias
0 1,005
Hi, Can somebody help me solve the following PDE? ∂p(x,t)/∂t = -p(x,t) + ∫λ(x-x')p(x',t)dx' with p(x,0)=δ(x)...
May17-12 05:46 PM
hunt_mat
2 1,169
I have non-linear system of ordinary differential equations to solve by first linearising it. I know it can be...
May21-12 01:43 PM
Vargo
2 1,575
Differentiate y = ln(x^{2} + sin x)exp^{4xcos(x)} (2x + 1)^{8} Thanks in Advance for Your Help
May17-12 02:01 AM
tiny-tim
1 1,264
Hello all, I am attempting to characterize a molecular pathway through a system of difference equations: W = W -...
May16-12 06:07 PM
DAVA
0 1,360
hey, can someone explain to me how mathematicians found out that for second order homogenous ODEs with constant...
May26-12 08:00 PM
algebrat
2 1,958
Im trying to solve ot for my thesis but i cant seem to find the answer: dx/dt = 2a*x(t) - 2b*x(t) - c(y)t ...
May18-12 06:57 AM
jackmell
1 1,384
Let us take a function defined by y=cx To differentiate that, we use the operator d/dx \frac{d}{dx} y =...
May19-12 09:27 PM
Nano-Passion
3 1,320
Dear Sirs, How to include the coupling coefficient of coupled mode equation in linear operator (or where ever it...
May21-12 11:51 PM
joshvaraj
0 1,144
I've completed my Engineering but doing a self study course in Dynamics of Structures and have got a very fundamnetal...
May23-12 12:39 AM
yus310
4 1,488
Consider the linear differential equation below: Lu=\lambda u With L a hermitian operator. We know that the...
May19-12 02:01 PM
Shyan
2 1,249
Help pls decide this Differential Equations!I did not coincide with the answer and in some no idea how to do! will be...
May22-12 06:34 PM
haruspex
4 1,234
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: ...
May25-12 09:21 AM
HallsofIvy
13 2,651
Hey guys, I'll take ordinary differential equations this summer. Class starts on June 4th. I wanted to get a head...
May21-12 09:56 PM
jean28
0 1,009
Hi, Just wanted to verify my process to complete the Fourier series in complex form. With the Function f(t) = 8,...
May23-12 10:35 AM
JamesEllison
0 1,306
Hey, I need your help to solve the following set of coupled differential equations numerically. ...
May28-12 06:30 PM
hunt_mat
5 2,894
I tried to solve it but confused. Pls. help me to solve this equation: dy/dx + (e^x)*Sec(y) = Tan(x); (hint:...
May22-12 04:40 PM
jackmell
3 1,307
like for example if we had a 2nd order differential equation is it possible that we can have more than 2 non-trivial...
May23-12 05:47 PM
AlephZero
3 1,757
Dear Friends i am trying to solve two first order differential eqs. with one algebraic eq. i am able to get...
May27-12 06:26 PM
rickyvery
2 1,948
I'm trying to write a code to implement he backwards Euler method to integrate the equation of motion. The sticking...
May26-12 08:04 AM
AlephZero
2 1,726
How do I take the inverse laplace transform of something that looks like this? It's part of a larger...
May28-12 06:33 PM
hunt_mat
3 1,368
They give a differential equation: x' = f_a(x) = ax(1-x) . In determining if the equilibrium points are sources or...
May29-12 04:38 AM
Simon Bridge
5 1,861
Could someone give me some hint (or some reference) about the study of regularity of weak solutions of (*)\quad...
May29-12 05:35 PM
Goklayeh
0 1,453
Ok, this should be quite simple. I've been looking at this problem for quite some time now, and I'm tired.. Please...
May31-12 06:56 AM
HallsofIvy
3 1,366

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