Here is the one offender I found, I don't know if there are more.
(%i1) kill(all);
(%o0) done
(%i1) load(abs_integrate);
(%o1) C:/Maxima-5.17.1/share/maxima/5.17.1/share/contrib/abs_integrate.mac
(%i2) declare([a,b,c],constant);
(%o2) done
(%i3) signum(x-a/b)/2+1/2;
(%o3) signum(x-a/b)/2+1/2
(%i4) integrate(%,x);
(%o4) integrate(signum(x-a/b),x)/2+x/2
----- Original Message -----
From: "Barton Willis" <willisb at unk.edu>
To: "Richard Hennessy" <rvh2007 at comcast.net>
Cc: "Maxima List" <maxima at math.utexas.edu>
Sent: Wednesday, December 24, 2008 8:01 AM
Subject: Re: [Maxima] pw.mac 2.3.2 is available
The share/contrib package abs_integrate allows Maxima to integrate
some functions that involve abs, signum, min, and max. Unlike pw.mac,
abs_integrate.mac does not have any functions for defining or working
with piecewise defined expressions. I suggest that you continue to
improve pw.mac--especially its support for piecewise defined
expressions. And of course, if pw.mac is able to integrate expressions
that abs_integrate cannot, that's great! Also, let me know what
abs_integrate is unable to do.
Barton
-----maxima-bounces at math.utexas.edu wrote: -----
>Maybe it's not the last version because there seems to still be a need for
>pw(). pw.mac can do some integral's that abs_integrate
>can't.
>
>Rich
>