MathGroup Archive: December 2008 [00609]

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Re: Re: branch of (-1)^(1/3)

To: mathgroup at smc.vnet.net
Subject: [mg94602] Re: [mg94559] Re: branch of (-1)^(1/3)
From: Daniel Lichtblau <danl at wolfram.com>
Date: Wed, 17 Dec 2008 06:34:14 -0500 (EST)
References: <ghtjcj$r7f$1@smc.vnet.net> <200812141236.HAA10144@smc.vnet.net> <gi5jru$pto$1@smc.vnet.net> <200812160735.CAA13395@smc.vnet.net>

slawek wrote:
> [...]
> Actually the solution is to redefine Power function in this way:
> 
>     Unprotect[Power]
>     Power[x_?Negative, Rational[p_, q_?OddQ]] := -(-x)^(p/q)
>     Protect[Power]
> 
> This is the answer from Technical Support Wolfram Research, Inc.
> [...]
> slawek

We get the answers we ask for. Kind'a like politics.

Daniel Lichtblau
Wolfram Research

References:
- Re: branch of (-1)^(1/3)
  - From: "sjoerd.c.devries@gmail.com" <sjoerd.c.devries@gmail.com>
- Re: branch of (-1)^(1/3)
  - From: "slawek" <human@site.pl>

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