On Thursday, December 14, 2017 at 1:36:27 AM UTC+1, rjf wrote: > > Whether there is a feasible "upgrade" to just use sympy's > solve is perhaps another path. >
Indeed, with Sage-8.1: sage: solve(x*abs(x)==1, x, algorithm='sympy') ValueError: Absolute values cannot be inverted in the complex domain. Unfortunately assumptions are not copied to SymPy at the moment see https://trac.sagemath.org/ticket/24078 However the situation in SymPy is unclear because there are two competing solve functions available: In [5]: x = symbols('x', real=True) In [6]: x.is_real Out[6]: True In [7]: solve(x*abs(x)-1, x) Out[7]: [1] In [8]: solveset(x*abs(x)-1, x) ValueError: Absolute values cannot be inverted in the complex domain. Regards, -- 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 https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
