Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site fisher.UUCP Path: utzoo!watmath!clyde!burl!ulysses!allegra!princeton!astrovax!fisher!igor 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.