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Re: a simplification problem


On 3/16/05 at 5:35 AM, fangh73 at xmu.edu.cn (Hui Fang) wrote:

>My questions is simple: How do I simplify (-1)^(1/3) to -1?

On one level the answer is you don't since

{(-1)^3,(1/2 + I Sqrt[3]/2)^3,(1/2 - I Sqrt[3]/2)^3}//Simplify

gives

{-1, -1, -1}

But if you want to force Mathematica to get a real cube root of a negative number, load the package Miscellaneous`RealOnly`
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