I am OK with keeping the default extend=True. But i would like it to be the opposite in the case of endomorphisms (i know it is not a good idea to have different default behaviours for matrices and endomorphisms, so i won't argue if its decided to keep it alwais true as default).
My reason to prefear extend=False in the case of endomorphisms is preciselly the teaching linear algebra. I define to my students a linear map emphasizing the ideas of domain and range, even doing some exercises about deciding where an element is in the domain or not. If after all that effort to make the groundings very precise, sage does preciselly what i told them not to do (that is, forgetting about these rigurous definitions and just care about the computations), well it is not the ideal scenario. Anyways, just having the option gives a solution to my problem. -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
