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From: igor@fisher.UUCP (Igor Rivin)
Newsgroups: net.math.symbolic
Subject: Re: Bug in Macsyma's definite integration ?
Message-ID: <750@fisher.UUCP>
Date: Wed, 21-Aug-85 18:20:57 EDT
Article-I.D.: fisher.750
Posted: Wed Aug 21 18:20:57 1985
Date-Received: Sat, 24-Aug-85 14:00:58 EDT
References: <256@watmum.UUCP>
Distribution: net
Organization: Princeton University.Mathematics
Lines: 16

> (c1) integrate( exp(-t)/(1+t), t, 0, infinity );
> INTEGRAL IS DIVERGENT
> 
> /* This is wrong.  Have I input the problem incorrectly ? */
> /* Also, after 10 minutes on the following problem. */
> 
> (c2) integrate( exp(-t)/(1+t^(3/2)), t, 0, infinity );
> NAME STACK OVERFLOW
> 
> /* Am using the latest version on a VAX running Berkely UNIX BSD 4.2 */

I suspect that if you use "inf" instead of "infinity" your problems will go
away; MACSYMA denotes complex infinity by "infinity" and real positive
infinity by "inf". This should be better documented.

Igor.