On Wed Aug 21 12:09:26 EDT 2013, 9f...@hamnavoe.com wrote: > > at least in terms of passing floating point test suites > > (like python's) the NaN issue doesn't come up > > Actually it was a test suite that revealed the NaN errors. > I wouldn't think it's something anyone needs in normal > day-to-day computation, but sometimes boxes must be ticked.
:-) it is hard to imagine how this is useful. it's not like ∑{i→∞}-0 is interesting. at least ∏{i→∞}-0 has an alternating sign. (so does it converge with no limit?) the difference i have seen is a situation like atan2(-0, x) ≡ -π atan2(+0, x) ≡ pi, ∀ x<0. any ideas on how this is useful? - erik