[Maxima-bugs] [ maxima-Bugs-1694983 ] rational doesn't work

[SourceForge.net <no...@so...>]

Bugs item #1694983, was opened at 2007-04-05 08:51
Message generated for change (Tracker Item Submitted) made by Item Submitter
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1694983&group_id=4933

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: Share Libraries
Group: Includes proposed fix
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Tarn Weisner Burton (twburton)
Assigned to: Nobody/Anonymous (nobody)
Summary: rational doesn't work

Initial Comment:
rational in funcs.mac doesn't appear to work. For instance "rational((3+2*%i)/(1+2*%i))" returns "(2*%i+3)/(2*%i+1)" This appears to be related to this:

(%i1) a:(1+2*%i)/(1+%i);
(%o1) (2*%i+1)/(%i+1)
(%i2) conjugate(ratdenom(a));
(%o2) conjugate(%i+1)
(%i3) ratsimp(%);
(%o3) 1-%i

conjugate appears to need an additional ratsimp. A fix for rational is to insert ratsimp, i.e. change

n:ratdisrep(ratnumer(z)*(cd:conjugate(d:ratdenom(z)))),

to

n:ratdisrep(ratnumer(z)*(cd:ratsimp(conjugate(d:ratdenom(z))))),

This probably just a kludge. Maybe conjugate is broken?


----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1694983&group_id=4933