Re: Weird result in Mathematica 6

*To*: mathgroup at smc.vnet.net*Subject*: [mg76426] Re: Weird result in Mathematica 6*From*: Bhuvanesh <BhuvaneshBhatt at gmail.com>*Date*: Tue, 22 May 2007 02:45:03 -0400 (EDT)

This is expected. From the Reduce documentation, under "More Information": Reduce[expr, vars] assumes by default that quantities appearing algebraically in inequalities are real, while all other quantities are complex. http://reference.wolfram.com/mathematica/ref/Reduce.html So you need to specify Complexes as the domain: Reduce[(z - a)/(1 - Conjugate[a]*z) == w && a*Conjugate[a] < 1 && w*Conjugate[w] < 1, z, Complexes] Bhuvanesh, Wolfram Research