Re: Incomplete gamma and beta



Could I suggest working on a import function instead of individual imports.
With a stretch; Maxim should allow an abstraction layer above individual
expressions or functions.  
	The idea would be to: examine the source file, convert it, then
write a linkage to it.  I realize that full automation is probably not
possible, but I would think that would be the goal and organizing principle.

Ray Rogers

> -----Original Message-----
> From: Raymond Toy [mailto:raymond.toy at ericsson] 
> Sent: Tuesday, March 15, 2005 12:31 PM
> To: Robert Dodier
> Cc: riotorto@yahoo.com; maxima@math.utexas.edu
> Subject: Re: [Maxima] Re: Incomplete gamma and beta
> 
> 
> >>>>> "Robert" == Robert Dodier  writes:
> 
>     Robert> Well, I'm interested in these functions for the same
>     Robert> reason as Mario -- these appear in statistical math.
>     Robert> So, yes, it would be great if these functions were added.
> 
> Good enough reason for me.
> 
>     Robert> If there are other functions from slatec/fnlib, 
> do we want to
>     Robert> go nuts and just import them all? Maybe make a 
> list and take votes?
> 
> Uh, we could go nuts, but right now, to make them available to maxima,
> I have had to handwrite each maxima function to call the converted
> slatec function.  So, handwriting an interface for each function is a
> pain.
> 
> But perhaps a macro could make it simpler if the functions are truly
> functions.
> 
> A list and a vote to prioritize them would be good.
> 
> The other issue is what to do about the mathematical properites of
> such functions.  If we implemented, say, an incomplete gamma function,
> it would be nice if maxima actually knew something about the
> incomplete gamma function.  Things like derivatives, integrals,
> limits, special values, etc.
> 
> So adding a double-float evaluation is just a small part of the whole
> thing.
> 
> Ray
> 
> 
> 
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