Problem with DSolve
- To: mathgroup at smc.vnet.net
- Subject: [mg132147] Problem with DSolve
- From: sam.takoy at yahoo.com
- Date: Fri, 27 Dec 2013 23:27:57 -0500 (EST)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
- Delivered-to: l-mathgroup@wolfram.com
- Delivered-to: mathgroup-outx@smc.vnet.net
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Hi,
The following equation has solution f(z) = 1, yet DSolve can't seem to find it:
DSolve[{-1 - Derivative[1][f][z]^2 +
f[z] (f^\[Prime]\[Prime])[z] == -f[z] (1 +
Derivative[1][f][z]^2)^(3/2), f[0] == 1, f[1] == 1}, f, z]
I get:
DSolve::bvnul: For some branches of the general solution, the given boundary conditions lead to an empty solution. >>
DSolve::bvnul: For some branches of the general solution, the given boundary conditions lead to an empty solution. >>
Any workaround?
Thanks!
Sam