Re: boundary conditions
- To: mathgroup at smc.vnet.net
- Subject: [mg121572] Re: boundary conditions
- From: "Oleksandr Rasputinov" <oleksandr_rasputinov at hmamail.com>
- Date: Tue, 20 Sep 2011 06:09:51 -0400 (EDT)
- Delivered-to: firstname.lastname@example.org
- References: <email@example.com> <firstname.lastname@example.org>
On Mon, 19 Sep 2011 12:11:15 +0100, Peter Pein <petsie at dordos.net> wrote: > Am 18.09.2011 14:20, schrieb goli: >> what is the difference between these boundary conditions? do they >> represent the same thing? >> Derivative[0,1]v[t,0]==0 >> v(0,1)[t,0]==0 >> > > Hi, > > you did not try to enter the two lines above, did you? > > The first one would make sense if it would read > > Derivative[0,1][v][t,0]==0 > > I guess you know about the meaning, because you're asking for BCs. > > But I can't imagine how > > v(0,1)[t,0]==0 > > should make sense without an extension of Mathematica's parser. > > > Peter > Apart from the fact that neither of these has been typed in correctly, if one interpolates the likely meaning, then yes, they represent the same thing: the first is in InputForm (or FullForm) while the second is in StandardForm. The underlying expressions are identical.