[racket-dev] nan?, infinite? and regular-real? [Was: Latest Plot Package]

On 11/18/2011 12:13 PM, Neil Toronto wrote:
> I've moved this to dev from a private discussion with Doug, who has just
> tried the nightly build.
>
> On 11/18/2011 11:43 AM, Williams, Doug wrote:
>> 2) The plot/utils has nan? and infinite?, which are also exported from
>> the science collection and I had to explicitly exclude them in the
>> require. Can we talk to the powers that be and see about getting them
>> (and finite?) moved to racket/math? Then we can both remove them from
>> our code. [I'm not sure about any interaction with the r6rs functions.]
>
> Powers That Be, Doug and I would like `nan?' and `infinite?' to be in
> `racket/math'.
>
> I made an exact equivalent of Doug's `finite?', but called it
> `regular-real?'. I use it in all kinds of function contracts (it returns
> #f for non-reals). We would also like that one, with either name, in
> `racket/math'.

How does 'finite?' differ from 'rational?'?

If we're making a wishlist, I'd really like 
'{positive,nonnegative}-{real,rational}?'.

Ryan