Re: Finding the real part of a symbolic complex expression
- To: mathgroup at smc.vnet.net
- Subject: [mg126595] Re: Finding the real part of a symbolic complex expression
- From: Cisco Lane <travlorf at yahoo.com>
- Date: Tue, 22 May 2012 05:20:12 -0400 (EDT)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
I think it needs to be simplified in order to get the assumptions to kick in. Also, Mathematica doesn't know to expand, so I would write:
Assuming[Element[{a, b, c, d}, Reals],Simplify[Re[Expand[(a + I b) (c + I d)]]]]