Re: using Dsolve for equation: y'' + |y|^2y=ay
- To: mathgroup at smc.vnet.net
- Subject: [mg84413] Re: using Dsolve for equation: y'' + |y|^2y=ay
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Fri, 21 Dec 2007 20:43:57 -0500 (EST)
- References: <fkeo6j$2il$1@smc.vnet.net>
Hi, can you explain the difference between y[x]^3 and Abs[y[x]]^2*y[x] for real functions ? If you don't find a difference try DSolve[y''[x] + y[x]^3 - a y[x] == 0, y[x], x] and get a solution with JacobiSN[] But it may depend on a if the function is real Regards Jens kem wrote: > Hi, > > Is it possible to use DSolve to solve the equation: y'' + |y|^2 > y=ay ? > > DSolve[y''[x] + Abs[y[x]]^2 y[x] - a y[x] == 0, y[x], x] > > gives some strange solution with symbols like K$1764^2 > > thanks >