Hello,
Sorry to focus on one little question and ignore the big picture, but
it's 6:15am :-)
> Will the pynac symbolics
> take away all my problems, or will I still have to add this
> (completely incomprehensible to my students) _fast_float_ thing, and
> only that if I am persistent enough to find it by searching this
> group, the wiki, or the documentation for quite a while (assuming I
> didn't know that I was looking for something like this ahead of time)?
This will be better in the new symbolics:
sage: x,y = var('x,y',ns=1)
sage: f = x^2 + y^2 -1
sage: list= [[i,j] for i in [-3..3] for j in [-3..3]]
sage: %time [(a,b) for a,b in list if f.subs(x=a).subs(y=b)==0]
CPU times: user 0.02 s, sys: 0.00 s, total: 0.02 s
Wall time: 0.02 s
[(-1, 0), (0, -1), (0, 1), (1, 0)]
--Mike
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