new bug in Limit
- To: mathgroup at yoda.physics.unc.edu
- Subject: new bug in Limit
- From: brigham!rprice at physics.att.com
- Date: Tue, 8 Jun 93 16:29:48 -0400
One of my old mma codes written under 1.2 now fails to work under 2.1, and
here's the reason why:
f[x_] = Erfc[x]/x;
This is a perfectly well-defined limit, as you can see by forcing mma to
apply l'Hopital's rule directly,
D[Numerator[f[x]], x]/D[Denominator[f[x]], x] /. x->0
Presumably there is some reason this new bug crept into mma version 2. Idle
curiosity would have me ask what it could possibly be, but since I need to
get some work done, all I'm really interested in is a fix or workaround.
rprice at physics.att.com
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