Services & Resources / Wolfram Forums / MathGroup Archive
-----

MathGroup Archive 2011

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

Search the Archive

Re: Question for Partial differential summationseries

  • To: mathgroup at smc.vnet.net
  • Subject: [mg122841] Re: Question for Partial differential summationseries
  • From: DrMajorBob <btreat1 at austin.rr.com>
  • Date: Sat, 12 Nov 2011 07:33:30 -0500 (EST)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • References: <201111110952.EAA08411@smc.vnet.net>
  • Reply-to: drmajorbob at yahoo.com

> the exact solution is "p" (or P[i, xv]).

With i undefined, that makes no sense.

Bobby

On Fri, 11 Nov 2011 03:52:55 -0600, dai <dahfsys at gmail.com> wrote:

> The function defined as follow
>
>
> x = X[t];
> y = Y[i, t];
> p = P[i, xv];
> w = Sum[y*p, {i, 1, N}];
>
> When we excuted partial differential "w" by "y"
> the exact solution is "p" (or P[i, xv]).
>
> However, the solution in Mathematica package is
> Sum[p, {i, 1, N}].
>
> How can I obtain the correct solution? please help.
>


-- 
DrMajorBob at yahoo.com



  • Prev by Date: Re: Simple DSolve equation
  • Next by Date: Re: Question for Partial differential summationseries
  • Previous by thread: Question for Partial differential summationseries
  • Next by thread: Re: Question for Partial differential summationseries