Hi SImon,

> Martin Albrecht pointed out in a related 
> threadhttp://groups.google.com/group/sage-devel/browse_thread/thread/497bfc...
> that one can also work with TermOrder objects, which allow for an easy
> creation of block orderings.
> Do you think that this would be an appropriate / natural /
> convenient / intuitive way to create a block ordering involving a
> matrix ordering?

Yes; this does strike me as an appropriate, natural, convenient, and
intuitive solution. :-) "Better", too. :-) :-)

> I think it would be easy to make conversion of R into a Singular ring
> work (just a few lines in TermOrder.__init__, I guess). However,
> implementing it such that it genuinely works in Sage seems to require
> substantial work on libsingular.

I don't know much about libsingular either, but that does seem to be
the case.

john
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