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jacobwilliams / quadpack

Modern Fortran QUADPACK Library for 1D numerical quadrature
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Regenerate coefficients with more precision for quad precision version #6

Closed jacobwilliams closed 2 years ago

jacobwilliams commented 2 years ago

See #5. Maybe we need 36 digits?

jacobwilliams commented 2 years ago

See also: https://www.advanpix.com/2011/11/07/gauss-kronrod-quadrature-nodes-weights/

jacobwilliams commented 2 years ago

I have the code now to generate them with more precision. All except for the ones in dqng, which I don't quite understand yet.

For the other, I will commit the updated values.

jacobwilliams commented 2 years ago

Code here: https://github.com/jacobwilliams/kronrod

jacobwilliams commented 2 years ago

For the Patterson ones in dqng, perhaps this code can be used?