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reference to DLAGBC in DHGEQZ #914

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thijssteel opened this issue Oct 13, 2023 · 3 comments
Open

reference to DLAGBC in DHGEQZ #914

thijssteel opened this issue Oct 13, 2023 · 3 comments
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@thijssteel
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DHGEQZ references DLAGBC for clarification in its calculation of the inverse reflector. Unfortunately, DLAGBC is no longer a part of LAPACK, nor is it present in the git history for as far as i can tell.

Does anyone have a very old lapack lying around that can send me the file? I could only find up to LAPACK 3.0 online.
@langou
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langou commented Oct 14, 2023

Hi Thijs, see: https://www.netlib.org/lapack/releases/ Cheers, Julien.

@christoph-conrads
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DHGEQZ was added in LAPACK 1.1 but there is no DLAGBC implementation. The index of the third edition of the LAPACK Users' Guide does not mention DLAGBC, same for the index of the second edition. How curious.

@weslleyspereira
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We published the pre-Git releases of LAPACK here.

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@langou @weslleyspereira @thijssteel @christoph-conrads