Re: Difficulties with Re
- To: mathgroup at smc.vnet.net
- Subject: [mg98337] Re: Difficulties with Re
- From: Pillsy <pillsbury at gmail.com>
- Date: Wed, 8 Apr 2009 02:45:18 -0400 (EDT)
- References: <grcgjq$pmv$1@smc.vnet.net>
On Apr 6, 5:04 am, Aaron Fude <aaronf... at gmail.com> wrote: > Of the following two expressions, the first "works", while the second > doesn't. How does one make it work? > Assuming[x > 0 && y > 0, Re[Exp[x + I y]] // Simplify] > Assuming[x > 0 && y > 0, Re[Exp[(x + I y)^2]] // Simplify] Try ComplexExpand[] instead of Simplify[]. You shouldn't even need to use Assuming[], since ComplexExpand[] explicitly tells Mathematica to assume all unspecified variables are real. Cheers, Pillsy