Keep it real

*To*: mathgroup at smc.vnet.net*Subject*: [mg114295] Keep it real*From*: Sam Takoy <sam.takoy at yahoo.com>*Date*: Tue, 30 Nov 2010 04:04:18 -0500 (EST)

Hi, Is there a way to make Mathematica stick to real numbers and functions as much as possible? For example, could I somehow get two real function solutions to the problem DSolve[g''[z] + (\[Lambda] Cosh[(z - H/2)/a]^2) g[z] == 0, g, z]; Many thanks in advance, Sam