8000 gh-85417: Clarify behaviour on branch cuts in cmath module by mdickinson · Pull Request #102046 · python/cpython · GitHub
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gh-85417: Clarify behaviour on branch cuts in cmath module #102046

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merged 3 commits into from
Feb 19, 2023
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gh-85417: Clarify behaviour on branch cuts in cmath module #102046

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ed5c0a5
gh-85417: Clarify behaviour on branch cuts in cmath module
mdickinson Feb 19, 2023
8d272e2
Grammar tweak: remove unnecessary comma
mdickinson Feb 19, 2023
621fb2c
Remove another comma for better flow
mdickinson Feb 19, 2023
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Grammar tweak: remove unnecessary comma
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@mdickinson
mdickinson authored Feb 19, 2023
commit 8d272e241b223c2985a6477f4d0d78442d57be5a
2 changes: 1 addition & 1 deletion Doc/library/cmath.rst
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Expand Up @@ -19,7 +19,7 @@ the function is then applied to the result of the conversion.
define those functions on the cut itself. Following Kahan's "Branch cuts for
complex elementary functions" paper, as well as Annex G of C99 and later C
standards, we use the sign of zero to distinguish one side of the branch cut
from the other: for a branch cut along (a portion of) the real axis, we look
from the other: for a branch cut along (a portion of) the real axis we look
at the sign of the imaginary part, while for a branch cut along the
imaginary axis, we look at the sign of the real part.

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