Re: wrong answer or no answer?

*To*: mathgroup at smc.vnet.net*Subject*: [mg82724] Re: [mg82710] wrong answer or no answer?*From*: Daniel Lichtblau <danl at wolfram.com>*Date*: Tue, 30 Oct 2007 03:20:26 -0500 (EST)*References*: <200710291054.FAA06915@smc.vnet.net>

Roger Bagula wrote: > M = {{-1, I}, {I, 1}} > MatrixPower[M, 1/2] > gives > {{0, 0}, {0, 0}} > [...] > > All this leaves me really puzzled. > Usually Mathematica takes away my doubts, > but here it isn't any help at all. > Maybe it is a paradox? > Roger Bagula The MatrixPower result is a bug, which we will investigate. Daniel Lichtblau Wolfram Research

**References**:**wrong answer or no answer?***From:*Roger Bagula <rlbagula@sbcglobal.net>