complex and real infinity in Sage

0 views
Skip to first unread message

ma...@mendelu.cz

unread,
Feb 11, 2010, 12:15:34 PM2/11/10
to sage-devel
Dear Sage

Lenka Viskotova found a bug in evaluating limits in Sage. Evaluating
limits via Maxima may return complex infinity or real ininity. Sage
does not distinguish between them. As a consequence, limit(1/x,x=0) is
wrong.

I was not able to find report on this and thus reported this as
http://trac.sagemath.org/sage_trac/ticket/8237

A quick fix could be to return NaN if maxima returns "infinity" and
+Infinity if maxima returns "inf". But I think that similar problem
may appear in other commands as well. Any idea how to distinguish real
and complex ininifty in Sage?

Thanks
Robert Marik

Reply all
Reply to author
Forward
0 new messages