Will there be a trac made about this? On Tuesday, June 7, 2016 at 3:36:50 PM UTC-5, john_perry_usm wrote: > > This surprised me today: > > > limit(1/x, x=0) > Infinity > > I was expecting something more like this: > > > limit(x/abs(x), x=0) > und > > The help on Infinity wasn't illuminating: > > > Infinity? > Type: PlusInfinity > String form: +Infinity > > ...and so forth. This implies to me that Infinity and +Infinity are the > same, but Sage seems to give a different result for the one-sided limit: > > > limit(1/x, x=0, dir='right') > +Infinity > > Why am I getting a different answer this time? I'll grant that Sage > eventually simplifies them to the same: > > > (limit(1/x, x=0, dir='right') == limit(1/x, x=0)).full_simplify() > 1 > > (limit(1/x, x=0, dir='left') == limit(1/x, x=0)).full_simplify() > 0 > > ...but they print differently for some reason, and in any case I don't see > why Sage would report a limit when the two one-sided limits disagree. The > documentation on limit didn't help, either. > > Is this a bug, or do I misunderstand something? >
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