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A comment on One does not simply calculate the absolute value. Parent comment

Re:One does not simply calculate the absolute value by HWR_14 on Sunday August 22, 2021 @06:43PM (#28270430)
It's not -NaN vs NaN. There are a bunch of NaN types, which are not related like that. It could (according to the spec) change "NaN: Attempt to arcsin value greater than 1" to "NaN: Zero divided by Zero operation"
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