Re: [sage-support] elliptic curve extension degree
It's my fault as I wrote the code. if the given degree d fails the test d>1 then it's assumed to be 1 (even if d<0!!). As William says, raising an error would be better, so this should be fixed. John On Friday, March 23, 2012 6:08:36 PM UTC, Ken Ribet wrote: > > On Thursday, March 22, 2012 2:44:43 PM UTC-7, William wrote: >> >> On Thu, Mar 22, 2012 at 5:22 PM, Kenneth A. Ribet wrote: >> > >> > Consider this short sage transcript: >> > >> > sage: E=EllipticCurve(GF(3),[1,1]) >> > sage: for i in range(3): >> > ... print i,E.order(extension_degree=i) >> > 0 4 >> > 1 4 >> > 2 16 >> > >> > Sage seem to think that E has 4 points over the field with 1 element. >> Was >> > this intended? >> > >> >> When i=0, I would rather get an error message, e.g., Sage should I >> think raise a ValueError. I.e., I don't think that there is an >> extension of "degree 0". Do you agree? >> > > Yes, I'm afraid that there is no extension of degree 0. I agree! > > Ken > -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] elliptic curve extension degree
On Thursday, March 22, 2012 2:44:43 PM UTC-7, William wrote: > > On Thu, Mar 22, 2012 at 5:22 PM, Kenneth A. Ribet wrote: > > > > Consider this short sage transcript: > > > > sage: E=EllipticCurve(GF(3),[1,1]) > > sage: for i in range(3): > > ... print i,E.order(extension_degree=i) > > 0 4 > > 1 4 > > 2 16 > > > > Sage seem to think that E has 4 points over the field with 1 element. > Was > > this intended? > > > > When i=0, I would rather get an error message, e.g., Sage should I > think raise a ValueError. I.e., I don't think that there is an > extension of "degree 0". Do you agree? > Yes, I'm afraid that there is no extension of degree 0. I agree! Ken -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] elliptic curve extension degree
On Thu, Mar 22, 2012 at 5:22 PM, Kenneth A. Ribet wrote: > > Consider this short sage transcript: > > sage: E=EllipticCurve(GF(3),[1,1]) > sage: for i in range(3): > ... print i,E.order(extension_degree=i) > 0 4 > 1 4 > 2 16 > > Sage seem to think that E has 4 points over the field with 1 element. Was > this intended? > When i=0, I would rather get an error message, e.g., Sage should I think raise a ValueError. I.e., I don't think that there is an extension of "degree 0". Do you agree? > Ken > > -- > To post to this group, send email to sage-support@googlegroups.com > To unsubscribe from this group, send email to > sage-support+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/sage-support > URL: http://www.sagemath.org -- William Stein Professor of Mathematics University of Washington http://wstein.org -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] elliptic curve extension degree
Consider this short sage transcript: sage: E=EllipticCurve(GF(3),[1,1]) sage: for i in range(3): ... print i,E.order(extension_degree=i) 0 4 1 4 2 16 Sage seem to think that E has 4 points over the field with 1 element. Was this intended? Ken -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
