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{s/c/d/z}geqrf: document workspace query for empty matrices#1304

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Reference-LAPACK:masterfrom
jschueller:issue257
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{s/c/d/z}geqrf: document workspace query for empty matrices#1304
jschueller wants to merge 1 commit into
Reference-LAPACK:masterfrom
jschueller:issue257

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@jschueller

@jschueller jschueller commented Jun 13, 2026

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Clarify that the workspace query returns a valid LWORK (>= 1) even when MIN(M,N) = 0. The code already handles this correctly; this is purely a documentation update.

see #257

@martin-frbg

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If I read the later comments on the linked issue correctly, the intention was to keep it open until everybody is convinced that there are no similar cases (of returning an invalid workspace size when there's no work to do) left in other functions ?

Clarify that the workspace query returns a valid LWORK (>= 1) even
when MIN(M,N) = 0. The code already handles this correctly; this
is purely a documentation update.
@jschueller

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fair enough, lets leave it open

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