Date: Oct 11, 2013 6:20 AM
Author: Cristiano
Subject: Re: How to minimize a sum

On 11/10/2013 04:15, Ray Vickson wrote:
> If v_i is (sigma_ i)^ 2, the global minimum of
> sum v_i w_i ^2 occurs when w_i = c/v_i , and choose c to make sum v_i = 1: that is,
> c = 1/sum (1/v). [...]


It works. Thank you very much.
Cristiano