implemented lapack geqp3, orgqr, ungqr

TRIQS / nda

C++ library for multi-dimensional arrays

https://triqs.github.io/nda

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implemented lapack geqp3, orgqr, ungqr #59

Closed jasonkaye closed 7 months ago

jasonkaye commented 8 months ago

I have implemented the interface to lapack calls for three subroutines, used to compute the column-pivoted QR factorization, and to explicitly form the matrix Q. Simple tests are included.

Wentzell commented 7 months ago

Everything looks good now. Thank you @jasonkaye for this improvement!