Re: DSolve y'[t]==y[t-a]
- To: mathgroup at smc.vnet.net
- Subject: [mg73272] Re: DSolve y'[t]==y[t-a]
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Fri, 9 Feb 2007 02:23:38 -0500 (EST)
- Organization: Uni Leipzig
- References: <eqend4$4e6$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
Hi, that's a delay differential equation and fortunatly for you it is a linear one so you can use LaplaceTransform[] to transform it to an algebraic problem. Regards Jens Peter Breitfeld wrote: > I want to solve the equation in the subject. If I enter > DSolve[y'[t] == y[t - a], y[t], t] > I get the error DSolve::ambiguity. > > I triede to define > k[t]=y[t-a] > and to solve the resulting system, but this doesn't work either > because the ambiguity of the independent variable remains. > > Any ideas? > > > Gruss Peter