Precision of zgetrf

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Precision of zgetrf

Postby FrankM » Tue Aug 17, 2010 11:45 am


I use the zgetrf-routine for calculating the determinant of a complex matrix. Unfortunately, I think the round-off errors of the routine are in the order of 1e-15 and I need to calculate the determinant with a higher precision. So my question is, whether there is a way to increase the accuracy of the routine? In fact, I use them in C and I want to use "long double" instead of "double" precision.

Thanks in advance,
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