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Cmplx division by 0 and NaN #20

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rust-highfive opened this issue Nov 2, 2014 · 2 comments
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Cmplx division by 0 and NaN #20

rust-highfive opened this issue Nov 2, 2014 · 2 comments

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@rust-highfive
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Issue by huonw
Friday Apr 05, 2013 at 08:26 GMT

For earlier discussion, see rust-lang/rust#5736

This issue was labelled with: A-libs, B-RFC, I-wrong in the Rust repository

Should 1/(0+0i) be NaN+NaN i or fail, or something else.

see also #1284
@rust-highfive rust-highfive mentioned this issue Nov 2, 2014
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ghost commented Jun 19, 2015

There isn't much consensus among other languages:

  • C++ and Racket agree when dividing by ±0.0±0.0i, but they differ when dividing by ±inf±infi.
  • Python rejects division by ±0.0±0.0i, gives NaN+NaNi when dividing by a complex number where both components are infinite, and gives ±0.0±0.0i when dividing by a complex number with exactly one infinite component.
  • Julia gives NaN+NaNi when dividing by ±0.0±0.0i and gives ±0.0±0.0i when dividing by a complex number where one or both of the components is infinite.

@cuviper cuviper mentioned this issue Oct 30, 2015
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@cuviper cuviper mentioned this issue Dec 19, 2017
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cuviper commented Dec 19, 2017

This issue was moved to rust-num/num-complex#5

@cuviper cuviper closed this as completed Dec 19, 2017
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