Subject: Difference between area under curve and integrate
From: Barton Willis
Date: Mon, 9 Jan 2012 07:14:56 -0600
This is a abs_integrate bug; if you report it, I'll try to fix it.
--Barton
-----maxima-bounces at math.utexas.edu wrote: -----
To: "Maxima List" <maxima at math.utexas.edu>
From: "Richard Hennessy"
Sent by: maxima-bounces at math.utexas.edu
Date: 01/08/2012 08:35PM
Subject: Difference between area under curve and integrate
Hi list,
?
Is there a way to force Maxima to try to find a real solution to an integration problem so that it represents the area under the curve in cases where you get a complex number??
?
Consider,
kill(all)$
load(abs_integrate)$
rectform(float(rectform(integrate(exp(-signum(x-1)*x^3),x,-1,2))));
0.22200130530517 - 1.162123315419017 %i
?
If you plot the integrand it is just a real valued function with a well defined area under it but in this case it gives a complex number for an answer.
?
Rich
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