Re: mma big bad bug

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Article #1001

#1001

From: Giulio Ruffini
Date: Wed, 06 Jan 1993 00:59

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In article <15326.2b48512a@ohstpy.mps.ohio-state.edu> vandesande@ohstpy.mps.ohio-state.edu writes:
>Here is a bizzarre mma bug.  Try entering:
>
>Pi*Sqrt[Pi]/(2*3*Sqrt[2])
>
>Brett

I get (with Mma 2.0) the same "infinite" loop when Pi is replaced with other 
mathematical constants such as E, EulerGamma, Catalan. 
(I found this whilst trying to rule out my first thought which was that 
Power is getting confused  in looking for a way to apply E^(Pi I) = -1 )

Replacing Pi with, for example, 11 Pi seems to remove the problem, but
unprotecting and changing the attributes of Pi did not seem to help.

It is peculiar that the fact that Catalan has a special numerical value
affects Mma  even in cases where it is clear(?) that the 
numerical value is not used.

Andrew (from a friends account)        parkes@ucdhep.ucdavis.edu

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Path: arc1-ca.pugleaf.net!sparky!uunet!olivea!spool.mu.edu!agate!ucbvax!ucdavis!landau.ucdavis.edu!gruffini
From: gruffini@landau.ucdavis.edu (Giulio Ruffini)
Newsgroups: sci.math.symbolic
Subject: Re: mma big bad bug
Message-ID: <20742@ucdavis.ucdavis.edu>
Date: 6 Jan 93 00:59:00 GMT
References: <15326.2b48512a@ohstpy.mps.ohio-state.edu>
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