Clarify the return value range of log(x) #589
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tkoeppe
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| is pi. | ||
| The complex natural (base-$e$) logarithm of \tcode{x}. For all \tcode{x}, | ||
| \tcode{imag(log(x))} lies in the interval \crange{$-\pi$}{$\pi$}, and | ||
| when \tcode{x} is a negative real number, \tcode{imag(log(x))} is $\pi$. |
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Note that this is merely an editorial and typographic reformulation of the original wording. It is unclear how to reconcole this specification of log with Annex G of C11, which requires the phase the logarithm of a negative real number to depend on the sign of the imaginary part (which can be +/-0).
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[complex] Clarify the return value range of log(x)
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