Hello, I need to substitute some variable in a polynomial ring with a fractional power of another one. I know that the result still will be a polynomial, however I have discovered the following behaviour (v. 3.0.5 on sage.math):
sage: pr = PolynomialRing(QQ, "u,v") sage: pr.injvar() Defining u, v sage: u^(1/2) 1 sage: pr = PolynomialRing(QQ, "w") sage: pr.injvar() Defining w sage: w^(1/2) --------------------------------------------------------------------------- TypeError Traceback (most recent call last) /home/novoselt/<ipython console> in <module>() /home/novoselt/polynomial_element.pyx in sage.rings.polynomial.polynomial_element.Polynomial.__pow__ (sage/ rings/polynomial/polynomial_element.c:8179)() /home/novoselt/element.pyx in sage.structure.element.RingElement.__mul__ (sage/structure/element.c: 8814)() /home/novoselt/coerce.pyx in sage.structure.coerce.CoercionModel_cache_maps.bin_op_c (sage/ structure/coerce.c:5582)() TypeError: unsupported operand parent(s) for '*': '<type 'list'>' and 'Rational Field' sage: sqrt(w) sqrt(w) Is it how things were supposed to work for some reason or a bug? Thank you, Andrey --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
