[Maxima] limit(1/x, x, 0) => infinity
Barton Willis
willisb at unk.edu
Mon Dec 22 09:26:42 CST 2008
The Maxima limit function doesn't have a mechanism for declaring the
domain. so Maxima is unable to correctly determine limits such as (Z =
integers, R = reals)
limit(x in Z |-> sin(pi * x),x,inf) = 0
limit(x in R |-> sin(pi * x),x,inf) = und
Sometimes, conflating a function with its formula causes trouble.
But I think limit(1/x, x, 0) => infinity is OK.
Barton
-----maxima-bounces at math.utexas.edu wrote: -----
>That was Stravros's reasoning in the bug report. Maxima still
>has some problems distinguishing und from infinity - for example,
>limit(log(x), x, 0) and limit(exp(x*%i)*x,x,inf) currently return
>und but technically should return infinity.
>
>Dan
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