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

Feb2313 09:24 AM
micromass

1 
25,858 
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 
121,259 
I'm interested in solutions of an equation
f'(x) = \frac{xf(x)}{Af(x)+ Bx^2}
with some positive initial...

Aug1213 08:42 PM
jostpuur

13 
714 
Hi all,
I post this thread in the Calculus, but no one seems to be interested. I realize that's a wrong place, So I...

Aug1113 03:20 AM
jollage

0 
445 
Hi,
I am working on a quite difficult, though seemingly simple, nonhomogeneous differential equation in...

Aug913 12:00 PM
Mandelbroth

9 
816 
I've been trying to work on differential equations using several books and one of the first exercise questions I...

Aug813 02:04 AM
la6ki

4 
729 
I have studied both single variable and multivariable calculus. I was younger and spent hardly anytime on them but did...

Aug713 05:57 PM
kvkenyon

7 
640 
so my project is on reaction diffusion equations in 2d. i have been asked to reproduce known and published work to...

Aug713 09:14 AM
jackmell

26 
8,033 
To solve a 2nd order ODE, we can follow the steps as shown below. (Image 2 is a continuation from Image 1, apologies...

Aug613 12:57 PM
tade

2 
534 
I'm graphing a first order three variable linear ODE.
Can I use the Runge Kutta and Euler method together? I mean,...

Aug613 02:22 AM
chiyoung

0 
419 
Hey guys, I have a question for you... how would one go about solving an equation like this...
...

Aug513 06:44 PM
Simon Bridge

5 
599 
Hi guys,
I must solve, I believe, 2 simultaneous PDE's where the unknown function that I must find represent a...

Aug413 09:59 PM
fluidistic

2 
645 
So, as a result of a thought experiment, I've got a differential equation, which I can't solve:
R r'' \sin...

Aug213 02:03 AM
JJacquelin

6 
676 
I am having this set of equations:
∂υ / ∂x + ∂v / ∂y = 0
u ∂υ / ∂x + v ∂u / ∂y = g ρ + κ ∂2u / ∂y2
u ∂T /...

Aug113 12:51 PM
MarioC

0 
463 
Hello All.
I'm currently in a crash course on Xray Diffraction and Scattering Theory, and I've reached a point...

Aug113 02:16 AM
SteamKing

7 
650 
I would like to ask if anybody knows something about the methods of solving infinite linear autonomous systems of...

Jul3113 12:01 PM
Mandelbroth

3 
712 
Hello all.
I am working on a problem and I am getting a bit confused.
Suppose we have a poisson equation that we...

Jul3013 04:46 PM
freechus9

0 
402 
The question of Solving a Pfaffian ODE can be interpreted as the question of finding the family of surfaces U = c...

Jul2713 07:51 AM
bolbteppa

0 
439 
Hi all,
I'd like to solve the following problem in 3 dimensions:
\partial_t u(r,t) = D\Delta u(r,t)
u(r,0) = 0...

Jul2613 12:18 PM
mfb

3 
759 
Ahoy!
I'm trying to approximate f'(r) for the following equation using matched asymptotic expansions
...

Jul2613 05:31 AM
pasmith

1 
685 
Is there a hole in knowledge as to the origins of PDEs?
If there is a void, is Schwartz space a suitable basis?
...

Jul2513 08:02 PM
MarneMath

7 
737 
Hello,
I am new here. I hope I am posting my problem at the right place.
I need some urgent help regarding the...

Jul2413 02:28 PM
the_wolfman

1 
472 
Hi,
I derived the equation:
1+(y')^2y y''2y\left(1+(y')^2\right)^{3/2}=0
Letting y'=p and...

Jul2413 06:30 AM
jackmell

5 
694 
Hi All,
I need mathematical help from the topic electrical potential for lectures on physics by Richard Feynman.
...

Jul2213 12:33 PM
SteamKing

10 
806 
Solve the difference equation yn+1=(n+1)/(n+2) yn in terms of the initial value y0.

Jul2113 08:00 AM
HallsofIvy

11 
832 
Homework problem:
For the wave equation:
UttUxx=0, t>0, xER
u(x,0)=
1, x<1

Jul1713 12:49 PM
LCKurtz

1 
726 
Solve the difference equation yn+1=0.9yn in terms of the initial value y0.
y1=0.9y0
y2=0.9y1=(0.9)2y0...

Jul1513 09:28 AM
HallsofIvy

4 
721 
Solve the difference equation yn+1=sqrt((n+3)/(n+1)) yn in terms of the initial value y0.
y1=sqrt(3)y0...

Jul1413 05:13 PM
HallsofIvy

1 
498 
Hi all,
I am new to the forum :) and was hoping that you guys could help me out with the problem i am facing when...

Jul1413 08:26 AM
HallsofIvy

4 
674 
I am reading the article Mirela Vinerean:
http://www.math.kau.se/mirevine/mf2bess.pdf
On page 6, I have a...

Jul1213 03:20 AM
yungman

13 
918 
In thinking about SturmLiouville theory a bit I see I have no actual idea what is going on.
The first issue I have...

Jul1013 03:07 PM
the_wolfman

3 
608 
Hi, i’m looking for some mathematical tools for analysis or classification of solutions of optimal control...

Jul1013 12:59 PM
Ackbeet

1 
826 
I had made a post in the past about the same problem and unfortunately I wasn't clear enough
so I am trying again.
...

Jul1013 11:13 AM
the king

2 
524 
I am brushing up this topic. I want to verify both orthogonality between two functions and an orthogonal set ALWAYS...

Jul1013 06:33 AM
Ackbeet

5 
546 
Can anyone give me the proof or point me to a link to derive this First Integral of Bessel's Function.
...

Jul813 04:35 PM
yungman

6 
912 
Is there any relation between Rodrique formula and Bessel's equation? Is it necessary to apply Rodrigue formula in the...

Jul713 06:34 PM
fzero

1 
627 
Hi everyone, any help with this would be greatly appreciated..
I have been practicing simple differential...

Jul613 02:30 PM
lukka

3 
628 
The question comprises of three subparts which need to be converted to Clairaut's form and then solved :
(a) x p2 ...

Jul413 01:16 PM
vish_maths

0 
609 
People I am fairly new with dealing with DEs (and here I was thinking I got it all :palm: )
Any who: I am working on...

Jul413 01:01 PM
HallsofIvy

5 
552 
Hi there, I'm learning about solitons and chanced upon this pdf talking about the inverse scattering method. However,...

Jul413 05:04 AM
test1234

4 
571 
Would anybody have a resource for transversality conditions for the moving boundary calculus of variations problem...

Jul313 11:55 PM
bolbteppa

0 
385 
Hey guys, I am just looking for some online resources for solving the heat equation. So far I have looked at Paul's...

Jul213 04:42 PM
Ackbeet

1 
567 