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

MathGroup Archive 2009

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

Search the Archive

Re: DSolve bug

  • To: mathgroup at smc.vnet.net
  • Subject: [mg97804] Re: [mg97768] DSolve bug
  • From: DrMajorBob <btreat1 at austin.rr.com>
  • Date: Sun, 22 Mar 2009 05:47:31 -0500 (EST)
  • References: <200903211016.FAA14626@smc.vnet.net>
  • Reply-to: drmajorbob at bigfoot.com

The two answers are equivalent... just different ways of saying the same  
thing.

That is, any function f[x_,y_] can be reframed as f[x_][y_]:=f[x,y].

And vice versa.

Bobby

On Sat, 21 Mar 2009 05:16:25 -0500, Sotirios Bonanos  
<sbonano at inp.demokritos.gr> wrote:

> Hello,
>
> I have encountered the following bug in DSolve:
>
> DSolve[D[F[x, y, z], x, y] == 0, F[x, y, z], {x, y, z}]
>
> gives {{F[x, y, z] -> C[1][z][x] + C[2][z][y]}}
>
> instead of {{F[x, y, z] -> C[1][x, z] + C[2][y, z]}}
>
> I don't know if this has been fixed in Mathematica 7, but it is present  
> in versions 5 and 6.
>
> S. Bonanos
> http://www.inp.demokritos.gr/~sbonano/
>
>



-- 
DrMajorBob at bigfoot.com


  • References:
    • DSolve bug
      • From: Sotirios Bonanos <sbonano@inp.demokritos.gr>
  • Prev by Date: Re: Commutators with boson operators
  • Next by Date: Re: Online Graphic Output
  • Previous by thread: DSolve bug
  • Next by thread: Re: DSolve bug