Re: Those Pesky Minus Signs
- To: mathgroup at smc.vnet.net
- Subject: [mg43365] Re: Those Pesky Minus Signs
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Tue, 26 Aug 2003 07:13:43 -0400 (EDT)
- Organization: Universitaet Leipzig
- References: <bi7nep$p7e$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
- Sender: owner-wri-mathgroup at wolfram.com
Hi, (-1/2)(a + b + c) /. a_*b_Plus /; a < 0 :> (-a)*Expand[-b] Regards Jens David Park wrote: > > Dear MathGroup, > > How would one simplify > > (-1/2)(a + b + c) > 1/2(-a - b - c) > > so the minus sign was in front? Why does it get pulled within in the first > place? > > David Park > djmp at earthlink.net > http://home.earthlink.net/~djmp/