Dear devel, I'm working on #6388, and just want to confirm that Golam's request is in fact the behavior we would desire. To wit:
sage: a = Integer(-1) sage: a.log() ValueError about input being negative sage: log(-1) Same ValueError, since preparser turns -1 into Integer(-1) sage: log(SR(-1)) I*pi sage: log(CC(-1)) 3.14...*I Would anything break if a.log() returned a symbolic answer as above? Alternately, one could place a check in the global log() for nonpositive integers and make them symbolic before moving on. Or one could leave the existing behavior and just document it better. Something similar happens for input zero, except here SR(0) and CC(0) give various forms of infinity while the request is for log(0) as an answer. I think these are all easy to implement, but since there are several options and some of them might have implication for some code (integer stuff, or perhaps plotting) I did want to ask if there were any opinions. - kcrisman --~--~---------~--~----~------------~-------~--~----~ 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 URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
