On Friday, October 26, 2012 1:25:51 PM UTC+2, Volker Braun wrote:
>
>  there is no overflow, its  a numerical instability.
>
>>
the condition number is quite high I would say:

sage: M = load("M.sobj")       
sage: from numpy import linalg     
sage: linalg.cond(M)          
4.4178252500667382e+18

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