[Maxima] limit(1/x,x,0)

Leo Butler l.butler at ed.ac.uk
Wed Aug 26 20:46:23 CDT 2009



On Wed, 26 Aug 2009, Richard Fateman wrote:

< I think that limit was written to assume that the limit point was real, and
< that it was approached on the real line from above, below, or both.
< 
< Thus limit(1/x,x,0)  has 2 values, inf or -inf depending on the direction.
< infinity is unsigned infinity, so I think this is right.

Thanks. 
Perhaps I am being dense, but the documentation says

? infinity

 -- Constant: infinity
     `infinity' represents complex infinity.

I suppose that the documentation is not strictly correct, since an
unsigned real infinity is not a complex infinity. Leo

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