
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 
138,851 
Please post any and all homework or other textbookstyle problems in one of the Homework & Coursework Questions...

Feb2313 09:24 AM
micromass

1 
30,343 
The following seemed simple enough to me . . . I'm somewhat sure about the requisite physics, but shakey on the...

Jul2204 10:26 AM
cj

7 
6,388 
Hi all,
For my thesis I would like to solve the following second order nonlinear PDE for V(x,\sigma,t):
...

Jul1309 09:40 AM
mathy_girl

18 
6,384 
Hello! I got one question for you.
How come that (f \circ g)'(x) = f'(g(x)) g'(x) ?
Since (f \circ...

Aug1011 12:25 AM
dimension10

11 
6,383 
Apparently Torichelli made a therom that has something to do with flow rate out of containers. Can anyone help me with...

Nov1004 12:30 PM
Clausius2

1 
6,347 
Hi,
I desperately need help to solve the following differential equation for buckling of a beam with a uniform...

Jun3014 06:51 AM
AlephZero

20 
6,346 
I am having trouble with some of my homework. I am not quite sure how to find the damping ratio from a third order...

Sep711 11:42 PM
twillkickers

0 
6,341 
Hi,
I have a basic ODE:
y''(x)+\frac{1}{4}y'(x)=f(x)
on 0<x<L
With Boundary conditions:

Oct1106 01:07 PM
romeo6

4 
6,323 
Wrong section, sorry!

May1409 06:12 AM
nada

1 
6,281 
Hi all.
I am studying the use of split step fourier method to solve NLStyped equations.
One problem is that, for...

Feb1808 02:49 PM
n0_3sc

1 
6,262 
Whether somebody knows what equally
<int(F*Fcomp)dx>.
Where F(x,t) is complex function: F=F1+i*F2,...

Feb1004 12:56 PM
Alexey

0 
6,240 
In my research, I'm using a modified version of the wave equation:
\
I would like to take this PDE,...

Apr1909 06:44 PM
nkinar

3 
6,233 
Hello all,
This is my first post...
I am trying to make a code to numerically solve a problem, which is a heat...

Jan407 10:05 PM
windowless

0 
6,231 
When one compares the fundamental solution for Laplace's Equation one might note that in 2 dimensions this solution...

May909 07:52 AM
starzero

2 
6,198 
Well, i realy i am pissed at the moment because of this. I have been trying to figure out if there is a...

Sep2410 02:27 AM
notpigfly

16 
6,167 
Hi guys!
im getting stuck in solving the following Linear Partial Differential Equation:
2p+3q=x+y+1
now...

Sep1406 04:57 AM
kosovtsov

1 
6,159 
To calculate a p.d.f. of a r.v., I need to integral a product of two bessel function as
\mathcal{L}^{1} \left(...

Jul2908 12:13 AM
birisi11

1 
6,113 
Hi
Can any one please help me to solve the quasilinear partial differential equation:
...

Jan1408 06:20 PM
rezwan

0 
6,102 
Hi everyone, I need some help solving a bessel function of the 1st order. The equation is used to calculate the mutual...

May1009 09:33 AM
nada

5 
6,085 
Hi. I believe I understand separation of variables for a first order DE. But can anyone tell me how to use it on a...

Jul2210 12:20 AM
ross_tang

2 
6,074 
How to use power series to solve this nonlinear differential equation?

Aug1108 09:47 AM
Matthew Rodman

3 
6,068 
How i can solve a system of 6 first order differential equations by using numerical techniques like Euler method,...

Jul105 11:27 AM
saltydog

2 
6,067 
I feel so embarrased asking this question, but this is the place to get answers.
I have a 2nd order ODE with a...

Jan2905 11:12 AM
saltydog

4 
6,035 
http://img258.imageshack.us/img258/3518/01ck5.png
I would like to build a logistic differential equation for US oil...

Feb1908 03:18 PM
coomast

5 
6,034 
Can someone recommend to me a good textbook for Ordinary Differential Equations? One that easy easy to read. We are...

Oct2804 11:38 AM
ReyChiquito

1 
6,016 
Hey,
I have no idea where to start, for this question. I know that I will probably have to use vector and scalar...

Jun2105 02:53 PM
mustafa

2 
5,996 
Hi, I am solving a second order ODE. the result I got is an exponential to the power of a real and an imaginary part,...

May1105 03:48 PM
dextercioby

7 
5,992 
Everybody knows one dimensional wave equation \frac{\partial^2u}{\partial t^2} = c^2 \frac{\partial^2u}{\partial x^2}...

Apr2710 09:06 AM
Hootenanny

1 
5,989 
Hello
i have a question :
dx/dt=(a*x)+(b*y)+(c*z)
dy/dt=(d*x)+(e*y)+(f*z)
dz/dt=(g*x)+(h*y)+(i*z)

Oct1505 05:26 AM
saltydog

17 
5,986 
i have 2 questions
1. what does a, b, m, n represent in the following LotkaVolterra model:
\frac{dx}{dt} = (a ...

Aug1407 06:07 PM
arildno

6 
5,967 
I am reading a text about Laplace transform in solving differential equations. Seems that this method is so powerful....

Jun1109 12:42 PM
Mute

4 
5,961 
Hi,
I'm trying to find an analytical solution of Laplace's equation:
\phi_{xx} + \phi_{tt} = 0
with the...

Dec807 06:37 PM
coomast

4 
5,947 
guys please help me, i'm trying to solve a simple moving PDE equation in matlab.
The equation i'm trying to solve is...

Feb1810 09:40 PM
kribosgiros

5 
5,944 
I'm stuck on what to do here. The question reads Consider a population P(t) satisfying the logistic equation dP/dt =...

Apr809 06:25 PM
doubedylan

4 
5,940 
Hi All,
I have a differntial equation that I came up with on a little engineering problem posted here...

Aug2306 07:43 PM
HallsofIvy

4 
5,940 
1.Use implicit differentiation to find the equation of the tangent line to the curve
xy^3+xy=16 at the point (8,1) ....

Oct2207 11:39 PM
rocomath

1 
5,933 
I know nothing about DEs, so this may be a silly question.
I'm given some time varying (x_t)_t and a constant r,...

Oct1313 06:18 PM
economicsnerd

3 
5,905 
can anyone give me the most simple for someone with little diffrential equations back ground, on the proof for where...

Oct1004 05:36 PM
leoflc

7 
5,897 
Hi!
I have a serious problem solving the following system of differential equations:
...

Nov2404 07:01 PM
Dr Transport

7 
5,897 
For a second order linear differential homogeneous equation, if the two solution y1 and y2 is a multiple of one...

Feb1009 09:54 PM
Emreth

4 
5,884 
I am sure most of you are familiar with the equation: m(x)''+c(x)'+k(x) = 0. Then, we create an auxillary equation...

Oct607 12:37 PM
HallsofIvy

2 
5,881 