DSolve y'[t]==y[t-a]

*To*: mathgroup at smc.vnet.net*Subject*: [mg73219] DSolve y'[t]==y[t-a]*From*: Peter Breitfeld <phbrf at t-online.de>*Date*: Thu, 8 Feb 2007 03:33:00 -0500 (EST)

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 -- ==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-== Peter Breitfeld, Bad Saulgau, Germany -- http://www.pBreitfeld.de