Re: Declaring real variables using Element
- To: mathgroup at smc.vnet.net
- Subject: [mg63452] Re: [mg63427] Declaring real variables using Element
- From: Bob Hanlon <hanlonr at cox.net>
- Date: Sun, 1 Jan 2006 01:16:05 -0500 (EST)
- Reply-to: hanlonr at cox.net
- Sender: owner-wri-mathgroup at wolfram.com
Conjugate[I*S]//ComplexExpand (-I)*S Simplify[Conjugate[I*S],Element[S, Reals]] (-I)*S Refine[Conjugate[I*S],Element[S, Reals]] (-I)*S Assuming[Element[S, Reals], Simplify[Conjugate[I*S]]] (-I)*S Bob Hanlon > > From: "GidiL" <gidienator at gmail.com> To: mathgroup at smc.vnet.net > Date: 2005/12/31 Sat AM 06:40:25 EST > Subject: [mg63452] [mg63427] Declaring real variables using Element > > Hello to all! > > I am trying to declare the variable S to be real, using the Element > command: > Element[S, Reals] > > Next I calculate the complex conjugate of IS (I is the imaginary unit) > Conjugate[\[ImaginaryI] S] > > The result I get is > -\[ImaginaryI] Conjugate[S] > > which should have been -IS. Why does it not recognise S as a real > variable? > > I would appreciate any help. > > Thanks, > Gideon > >