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

  • To: mathgroup at smc.vnet.net
  • Subject: [mg94505] Re: branch of (-1)^(1/3)
  • From: "slawek" <human at site.pl>
  • Date: Mon, 15 Dec 2008 07:44:21 -0500 (EST)
  • References: <200812121154.GAA27892@smc.vnet.net> <gi2uug$a6m$1@smc.vnet.net>

U¿ytkownik "Carl Woll" <carlw at wolfram.com> napisa³ w wiadomo¶ci 
news:gi2uug$a6m$1 at smc.vnet.net...
> I assume you mean a simple way to choose the branch of a^(1/3), where a
> is real. If so, you can use:
>
> Root[#^3-a&, 1]
>
> Carl Woll
> Wolfram Research


Great,

so probably I would need something like this

% /. {a_^3 -> Root[#^3 a&,1]}

Thanks
slawek



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