Re: Re: branch of (-1)^(1/3)
- To: mathgroup at smc.vnet.net
- Subject: [mg94536] Re: [mg94459] Re: branch of (-1)^(1/3)
- From: Murray Eisenberg <murray at math.umass.edu>
- Date: Mon, 15 Dec 2008 07:49:59 -0500 (EST)
- Organization: Mathematics & Statistics, Univ. of Mass./Amherst
- References: <ghtjcj$r7f$1@smc.vnet.net> <200812141236.HAA10144@smc.vnet.net>
- Reply-to: murray at math.umass.edu
And finding that tutorial is not difficult even if you don't know it's precise title: in the Documentation Center, just search on "branch" or "multiple values". sjoerd.c.devries at gmail.com wrote: > There is a tutorial on this issue in the documentation centre (V7) at > tutorial/FunctionsThatDoNotHaveUniqueValues. It seems the branch cuts > and primal roots are fixed and not user selectable. > > Cheers -- Sjoerd > > On Dec 12, 1:53 pm, "slawek" <hu... at site.pl> wrote: >> Is a simple way to choose the branch of (-1)^(1/3) ? >> >> Mathematica gives a (correct) non-real answer. It is ok, but I need the (= > -1) >> as the output when I input (1)^(1/3) because I know that it is a solut= > ion >> of real-valued problem. >> >> Is any "standard way" to pick up a correct (i.e. arbitrary) root of >> (-1)^(1/n) instead the default? >> >> slawek > > -- Murray Eisenberg murray at math.umass.edu Mathematics & Statistics Dept. Lederle Graduate Research Tower phone 413 549-1020 (H) University of Massachusetts 413 545-2859 (W) 710 North Pleasant Street fax 413 545-1801 Amherst, MA 01003-9305
- References:
- Re: branch of (-1)^(1/3)
- From: "sjoerd.c.devries@gmail.com" <sjoerd.c.devries@gmail.com>
- Re: branch of (-1)^(1/3)