Hi, If a symbolic expression contains symbolic derivative then checking whether it is zero, raises error: ------ sage: x.diff(x,2).is_zero() True
sage: f(x).diff(x).is_zero() .... NotImplementedError: derivative ------ This fails because new symbolics tries to convert it to maxima expression for checking the relation. This is rather disturbing as its works fine for other expressions without invoking maxima. Increasingly it appears to me that FDerivative construct is not so well integrated with rest of the new symbolics (pynac). Cheers, Golam --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send 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 -~----------~----~----~----~------~----~------~--~---
