
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 
136,519 
Please post any and all homework or other textbookstyle problems in one of the Homework & Coursework Questions...

Feb2313 09:24 AM
micromass

1 
29,554 
I'm having trouble understanding the concept of laplace transformations.
my book states that it is comparing how...

Apr2605 09:04 PM
Corneo

1 
1,054 
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 
1,054 
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 
1,054 
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 
1,054 
Prb:(x^4+4*x^2+16)y"+4(x1)y'+6xy=0
P=(x^4+4*x^2+16) Q=4(x1) R=6x
P=0 for  1  3^(1/2)*i
1 ...

Jul2212 02:37 PM
HallsofIvy

1 
1,054 
Hi guys,
Here is an equation that I have tried for few days to solve and still haven't succeeded, I'm interested...

Mar2813 11:55 PM
Simon Bridge

9 
1,054 
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 
1,053 
Is the Airy function (of the first kind) normalized? If I take the integral
Ai(x) dx
on the entire axis, does it...

Sep1813 12:56 PM
Irid

2 
1,053 
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 
1,052 
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 
1,052 
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 
1,052 
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 
1,052 
Hi, so the problem is this:
I am trying to solve (analytically) the wave equation with c=1:
u_{xx}=u_{tt}
on...

Mar2513 12:05 PM
Gengar

1 
1,052 
Given a function: z(x,y) = 2x +2y^2
Determine ∂x/∂y ,
Method 1:
x = (z/2)  y^2
∂x/∂y = 2y
Method 2:

Nov1413 06:05 AM
SteamKing

8 
1,052 
Hello all,
I was wondering if you could share your thoughts regarding how one should go about solving PDEs in which...

Oct2810 02:20 PM
masnet

0 
1,051 
Find the Particular Solution. Show the steps of derivation, beginning w/ the general solution....

Nov2310 12:10 PM
Matthew Rodman

1 
1,050 
Hi Mathematicians,
I recently encountered this problem in maximization...
Maximize 1170X1 + 1110X2
Subject to
1. ...

Feb211 07:34 AM
chwala

2 
1,050 
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 
1,050 
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 
1,050 
Something has been bothering me. I see a phrase like this:
Plugging our two roots into the general form of the...

Oct1713 02:44 PM
mesa

3 
1,050 
Dear All,
I need help on the following issue. Assuming the flow to be potential, I want to compute the potential...

Mar2009 06:28 AM
mathf

0 
1,049 
Hey guys,
I'm sure i'm doing something really daft in not getting this to work, but...
I want to use NDSolve to...

Jul510 02:39 PM
rabbahs

1 
1,049 
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 
1,049 
I'm having trouble finding out how to set up Neumann (or, rather, "Robin") boundary conditions for a diffusiontype...

Nov1212 10:58 AM
Vargo

1 
1,049 
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 
1,048 
How can we say:
f(x)=A'sin(kx)+B'cos(kx)
or equivalently
f(x)=Ae^{ikx}+Be^{ikx}??
How are these two...

Nov1812 04:44 AM
M. next

6 
1,048 
(reposted in the Homework/Coursework forum)

Aug2609 10:24 AM
jahnybrew

0 
1,047 
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 
1,047 
I want to solve the boundary value problem:
Laplace's equation for u(r, theta) = 0, 1 < r < 2, 0 < theta < a
...

Apr2211 11:31 AM
Engineer214

2 
1,046 
I want to know is it important to study D'Alembert solution? My main goal is to study Electromagnetics and wave...

Feb2410 07:39 PM
truth is life

1 
1,046 
hi guys
i cannot solve this.
say that y'' + y = g(t) derive the formula y(t) = c1*cost + c2*sint + convolution...

Jul2810 12:48 PM
Dickfore

2 
1,046 
I have been thinking about numerical methods for ODEs, and the whole notion of stability confuses me.
Take Euler's...

Nov2912 09:48 AM
Master J

3 
1,046 
Hi,
I am not sure if this is the correct forum, but...
I am working with FFTs of real signals. I have a FFT of...

Oct2113 11:13 PM
swraman

7 
1,046 
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 
1,045 
I've taken a first semester course on PDEs. Basically all we learned was separation of variables and method of...

Apr1911 07:04 AM
AlephZero

1 
1,045 
If one were to solve an iterative system, how would they do so. I'm studying them, and am wondering how to find fixed...

Mar1110 07:23 AM
tinytim

1 
1,043 
Hello all,
I'm working through old exams for an electrical subject (no solutions given) and I think I've gone wrong...

Jun1413 06:01 AM
Nikarasu M

3 
1,043 
We did this new mathematics thing in class today which I did not understand, it came under the topic of...

May805 08:31 AM
arildno

5 
1,042 
I have the solution (a potential) for a nonlinear differential equation found at r=0. How can I calculate the...

Jun2709 03:56 PM
Bob_for_short

1 
1,042 
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 
1,042 