Aubrey Jaffer wrote:
>  | Date: Mon, 24 Oct 2005 03:25:09 -0500
>  | From: Alan Watson <xxxxxx@astrosmo.unam.mx>
>  |
>  | NaNs are atoms -- they have no context or stucture, just a single
>  | value.
>
> In an implementation which boxes flonums, NaNs aren't a single value;
> EQ? and EQV? are *not* guaranteed to return #t given two NaNs.

eq? is not guaranteed to return #t given two equal flonums
eqv? *is* guaranteed to return #t given two equal flonums.

NaNs should be the same: two NaNs that have the same bit-pattern
and size must compare as eqv? but not necessarily eq?.
--
	--Per Bothner
xxxxxx@bothner.com   http://per.bothner.com/