Re: Difficulties with Re
- To: mathgroup at smc.vnet.net
- Subject: [mg98332] Re: Difficulties with Re
- From: Jens <noeckel at gmail.com>
- Date: Wed, 8 Apr 2009 02:44:24 -0400 (EDT)
- References: <grcgjq$pmv$1@smc.vnet.net>
On Apr 6, 2:04 am, Aaron Fude <aaronf... at gmail.com> wrote: > Hi, > > 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] > > Many thanks in advance, > > Aaron This is a case for ComplexExpand: Re[Exp[(x + I y)^2]] // ComplexExpand You could also do this: Assuming[x > 0 && y > 0, Re[Exp[(x + I y)^2]] // ExpandAll // Simplify] Jens