[Date Index]
[Thread Index]
[Author Index]
Re: Redefining Log over it's branch cut
 To: mathgroup at smc.vnet.net
 Subject: [mg77507] Re: Redefining Log over it's branch cut
 From: chuck009 <dmilioto at comcast.com>
 Date: Mon, 11 Jun 2007 04:21:14 0400 (EDT)
Hello Dimitris,
Is there a way to have Mathematica do this substitution internally when evaluating powers such as z^s? The reason I ask is that I'm working on the contour integral expressions for Zeta and Polylog which use the Hankel contour. This contour requires the substitutions z=rExp[pi i] and z=r Exp[pi i]. However, Mathematica assigns the "standard convention" of pi to the argument for both cases. For example if I specify:
In[248]:=
N[z^(s1)/.z>r Exp[Pi I]]
Mathematica return an answer that is actually:
Exp[(s1)(Log[r]+pi i]
and not:
Exp[(s1)(Log[r]pi i]
I realize that's the standard convention. Just would make my code a little less messy if I didn't have to do the expansion myself and "manually" insert the pi i factor.
Prev by Date:
questions
Next by Date:
Re: NIntegrate with change of variables (discovering also a bug in
Previous by thread:
Re: Redefining Log over it's branch cut
Next by thread:
Re: Re: Redefining Log over it's branch cut
