Re: [Bug-glpk] 0 ** 0; result undefined

[xypron]

A nice discussion on 0^0 can be found at 
http://mathforum.org/dr.math/faq/faq.0.to.0.power.html
http://mathforum.org/dr.math/faq/faq.0.to.0.power.html 

The coding in question is in src/glpmpl03.c function fp_power.
As pow(0,0) returns 1 it would not cause any problems, to treat 0^0 as
defined.
As no GMPL model runs better when 0^0 is undefined but some are easier to
formulate if it is defined making it defined seems a good choice.

Best regards

Xypron



Andrew Makhorin wrote:
> 
>> "0 ** 0; result undefined "
> 
>> Result of 0 ** 0 is defined, it #39;s 1. That #39;s all.
>  
> In the strong mathematical sense 0 ** 0 is undefined. Defining 0 ** 0
> as 1 violates continuity and sometimes may lead to false conclusions.
> 
> Nevertheless, if you disagree with that, you can always check operands
> to produce desirable result, for example:
> 
> param a := (if x = 0 and y = 0 then 1 else x ** y);
> 
> 
> 
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> 
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