Re: [pure-lang-users] math.pure

[Eddie R. <er...@bm...>]

If atan is defined for complex numbers, shouldn't atan2 ? 

e.r.

On Wed, 2008-08-20 at 15:49 -0500, Eddie Rucker wrote:
> Should we have the following rules?
> _+:nan = nan;
> nan+:_ = nan;
> nan<:_ = nan;
> _<:nan = nan;
> 
> My thinking is that if any part of a complex number is nan then the
> whole thing is not a number. OTOH, inf+:inf, 0+:inf, inf+:0, etc, you
> might want to keep that way for either further processing or to let the
> user know the result is a complex number. What does everyone think about
> this?
> 
> e.r.
> 
> On Wed, 2008-08-20 at 13:31 -0500, Eddie Rucker wrote:
> > Albert,
> > While testing, I looked over some of the logs and here are my
> > suggestions:
> > 
> > Add the rules
> > sqrt inf = inf;
> > sqrt nan = nan;
> > ln inf = inf;
> > ln nan = nan;
> > 
> > Both of these rules also fix
> > acosh and atanh of nan and inf
> > 
> > I think cis is broken for complex numbers. I've got to run give another
> > test.
> > 
> > e.r.
> > 
> > 
> > 
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