Stephen Kauffman wrote:
I'm trying to become cognizant of your caveats about conversion. What I've tried to write is a recursive function to convert polynomials (statements) in the Free BooleanPolynomialRing() to corresponding probability polynomials (statements) over QQ. I haven't convinced myself that it's correct, but it checks out with some examples and also for basic forms however what I've just discovered is that as in belowEX7.<P,Q,R,S,V,W> = BooleanPolynomialRing(6,order='lex') Prob(P + Q + R + S).ring() #yields an error message -- it doesn't seem to know that it's parent ring should be ProbRing Traceback (most recent call last): File "/projects/5511fe15-8085-4d1d-bdc7-c6bf6c99e693/.sagemathcloud/sage_server.py", line 733, in execute exec compile(block+'\n', '', 'single') in namespace, locals File "", line 1, in <module> File "element.pyx", line 344, in sage.structure.element.Element.__getattr__ (sage/structure/element.c:4022) File "misc.pyx", line 257, in sage.structure.misc.getattr_from_other_class (sage/structure/misc.c:1775) AttributeError: 'sage.rings.polynomial.multi_polynomial_libsingular.MPolynomial_libsingular' object has no attribute 'ring'
> [BIG SNIP] You can use foo.parent() or parent(foo) instead. -leif -- () The ASCII Ribbon Campaign /\ Help Cure HTML E-Mail -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
