libopenblas0-pthread 0.3.7+ds-6 (arm64 binary) in ubuntu focal

 OpenBLAS is an optimized BLAS library based on GotoBLAS2 1.13 BSD version.
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 Unlike Atlas, OpenBLAS provides a multiple architecture library.
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 All kernel will be included in the library and dynamically switched to
 the best architecture at run time (only on amd64, arm64 and i386).
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 For more information on how to rebuild locally OpenBLAS, see the section:
 "Building Optimized OpenBLAS Packages on your ARCH" in README.Debian
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 Configuration: USE_THREAD=1 USE_OPENMP=0 INTERFACE64=0