Mathematica 9 is now available
Services & Resources / Wolfram Forums / MathGroup Archive
-----

MathGroup Archive 2009

[Date Index] [Thread Index] [Author Index]

Search the Archive

newbie: diff equation

  • To: mathgroup at smc.vnet.net
  • Subject: [mg96886] newbie: diff equation
  • From: Mike <atkins1976 at yahoo.com>
  • Date: Thu, 26 Feb 2009 08:01:18 -0500 (EST)

My problem is very simple, I'm sure someone can help me out quickly. I am trying to solve some systems of differential equations a bit like a particle in a box (QM) so I started with this basic problem which I know how to solve just to make sure I am entering everything ok, but I can't even get it to work.

I want to solve f''[x]= - m^2 f[x]

with f[0] = 0 and f[Pi] = 0

this is obviously only solvable with the condition on m being integer but if I do DSolve on the above with the boundary conditions I just get f=0. How can I get mathematica to solve this and give me the conditions on m? I need to solve much more general problems of this type. I hope someone can help.
Many thanks


  • Prev by Date: Re: Need some help with monitoring evaluation
  • Next by Date: SparseArray Storage Format Real32
  • Previous by thread: Re: AbsoluteOptions and ViewMatrix
  • Next by thread: Re: newbie: diff equation