Hello Bryan

If you are interested in this, compile CVS version of Maxima and look,
if the CVS version has the same problem. If yes, report the problem at
http://sourceforge.net/tracker/?group_id=4933&atid=104933

I did similar work for inequality solver few week ago and this issue
has been fixed in CVS fast: 
http://sourceforge.net/tracker/?func=detail&aid=2882408&group_id=4933&atid=104933
- Now I only hope that this fixed version appears in Sage soon
(despite the fact that Maxima is with higher and higher version slower
and slower and from this fact I keep using version 5.13 on my server)

btw: perhaps using fractions instead of decimals solves your problem.

Robert



[ma...@taxus ~]$ sage
----------------------------------------------------------------------
| Sage Version 4.2, Release Date: 2009-10-24                         |
| Type notebook() for the GUI, and license() for information.        |
----------------------------------------------------------------------
sage: %maxima

  --> Switching to Maxima <--

''
maxima: expr:1.4*(.1873*z+.1752)/(z-1)/(z-.8187)
1.4*(0.1873*z+0.1752)/((z-1)*(z-0.8187))
maxima: radcan(expr)
(0.26222*z+0.24528)/(1.0*z^2-1.8187*z+0.8187)
maxima: expr:14/10*(1873/10000*z+1752/1000)/(z-1)/(z-8187/10000)
7*(1873*z/10000+219/125)/(5*(z-1)*(z-8187/10000))
maxima: partfrac(expr,z)
19393/(1295*(z-1))-190534251/(1295*(10000*z-8187))
maxima:


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