GF(4) is not a subfield of GF(8). John
On 16 September 2015 at 10:16, Nathann Cohen <nathann.co...@gmail.com> wrote: > Hello everybody, > > I am rather ignorant of Sage matters when it comes to finite fields. I have > been playing with matrices for a while, working around a bug that I did not > understand. It is now solved, but here is what it boils down to: > > sage: K1 = GF(4,'w') > sage: K2 = GF(8,'x') > sage: K2(K1(1)) > TypeError: unable to coerce from a finite field other than the prime > subfield > > Observe that the code works if K1 and K2 both use the same variable *name*. > > While this behaviour is probably justified I, as a beginner, just needed to > be told that both variable names should be the same. If somebody feels that > this could be made clearer somehow, that could save time for the next person > who will meet the problem (which was in my case hidden under layers of > matrices). > > Note also that Matrix.base_extend has no documentation. > > Thanks, > > Nathann > > -- > 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 http://groups.google.com/group/sage-devel. > For more options, visit https://groups.google.com/d/optout. -- 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 http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
