Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2004
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2004

[Date Index] [Thread Index] [Author Index]

Search the Archive

Complex Numbers

  • To: mathgroup at smc.vnet.net
  • Subject: [mg47425] Complex Numbers
  • From: Alejandro Vizcarra <gebankos at prodigy.net.mx>
  • Date: Sun, 11 Apr 2004 04:44:03 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,:
 
I always have problems when dealing with complex numbers.  How can i
work with Mathematica in such a way that every expression will
be considered real unless it is declared explicitly complex (like a = 3 + 4 I ) ?
 
For example if I type 

Re[ComplexExpand[ Exp[a I] Exp[b I]]]

I get the answer

-Im[Sin[ a+b]]+Re[Cos[a+b]]

Instead of simply Cos[a+  b]

Thnx!

 
Alejandro Vizcarra




  • Prev by Date: Re: Errors with decimal addition in Mathematica 5.0
  • Next by Date: FindRoot
  • Previous by thread: Differential Equations
  • Next by thread: Re: Complex Numbers