11 Jan
2008
11 Jan
'08
4:54 a.m.
Wolfgang Jeltsch
However, the fact that (0 / 0) == (0 / 0) yields False is quite shocking. It doesn?t adhere to any meaningful axiom set for Eq. So I think that this behavior should be changed. Think of a set implementation which uses (==) to compare set elements for equality. The NaN behavior would break this implementation since it would allow for sets which contain NaN multiple times.
You forget, that the intention of NaN is denial of membership of any set of numbers. -- Dipl.-Math. Wilhelm Bernhard Kloke Institut fuer Arbeitsphysiologie an der Universitaet Dortmund Ardeystrasse 67, D-44139 Dortmund, Tel. 0231-1084-257 PGP: http://vestein.arb-phys.uni-dortmund.de/~wb/mypublic.key