I have a 5th order algebraic equation. I want to know the number of positive or negative or imaginary roots of that equation.

04 April 2013 1 8K Report

I have a 5th order algebraic equation. I want to know the number of positive or negative or imaginary roots of that equation. Apart from Descarte's rule of sign's can anyone give an idea to find the number of negative roots of the equation.

Jaka Cimpric

Use Sturm's theorem (see Wikipedia) with a=-infinity and b=0.

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