Hey Aprit, The errors (there's numerous instances of each of these errors occurring. > Please find below one of each type): > (1) > sage: R.<t> = QQ[] > sage: sigma = R.hom([t+1]) > sage: S.<x> = R['x', sigma] > sage: S.twist_map(-1) > > > > *Got - TypeError: bad operand type for unary ~: > 'sage.rings.morphism.RingHomomorphism_im_gens'Expected - > NotImplementedError* > This looks like you are trying to invert a morphism which does not have a defined __invert__ method. If you are expecting it to, then you likely are creating objects (morphisms) different than what you are expecting.
> (2) > sage: k.<t> = GF(5^3) > sage: Frob = k.Frobenius_endomorphism() > sage: S.<x> = k.['x', Frob] > sage: a = x^3 + (t^2 + 1)*x^2 + (2*t + 3)*x + t^2 + t + 2 > > > > *Got - Exception raised:... (traceback) TypeError: Cannot convert int to > sage.structure.element.Element* > >> >> Somewhere in the computation, you are creating/returning a python int, which is getting passed/returned by a _cmp_, _call_, etc, instead. Also, as a more generic comment from browsing through the code, I don't really like having objects for Right and Left, and in particular, I strongly think they should not be included in the global namespace. Best, Travis -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
