Re: Real numerical computations
- To: mathgroup at smc.vnet.net
- Subject: [mg71736] Re: Real numerical computations
- From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
- Date: Tue, 28 Nov 2006 06:03:41 -0500 (EST)
- Organization: The Open University, Milton Keynes, UK
- References: <ekeb6t$t42$1@smc.vnet.net>
José Carlos Santos wrote: > Hi all, > > With Mathematica, if I type > > N[(-1.)^(1/3)] > > I get > > 0.5 + 0.866025 i > > This is correct, of course, but I would like to get -1. instead. How do > I tell Mathematica that I want a real result (if there is one)? > > Best regards, > > Jose Carlos Santos > Have a look at the technical FAQ titled "How do I get x^(1/3) (where x is a negative number) to evaluate to a real number?" http://support.wolfram.com/mathematica/mathematics/algebra/realpower.html Best regards, Jean-Marc