ASKSAGE: Sage Q&A Forum - RSS feedhttps://ask.sagemath.org/questions/Q&A Forum for SageenCopyright Sage, 2010. Some rights reserved under creative commons license.Tue, 17 Mar 2020 21:51:29 +0100SageMath is not solving this inequalityhttps://ask.sagemath.org/question/50287/sagemath-is-not-solving-this-inequality/I have the following inequality:
ineqal=T1Sol[0].rhs().numerator() > 0
ineqal
$$-\kappa m^{4} + 8 \pi m^{3} r - 4 \pi r^{2} > 0$$
So it's a quadratic, but I would imagine it's solveable. Find the zeros, check the sign on either side of them, and tell me where it's positive. If you need more info, yell at me about assumptions. But instead:
solve(ineqal,r)
$$\left[\left[-\kappa m^{4} + 8 \pi m^{3} r - 4 \pi r^{2} > 0\right]\right]$$
Sometimes I can trick it into behaving with some expand() or simplify_full(), but that seems not to be working here. Any ideas?thethinkerTue, 17 Mar 2020 21:51:29 +0100https://ask.sagemath.org/question/50287/Extract equalities from a list of assumptionshttps://ask.sagemath.org/question/32008/extract-equalities-from-a-list-of-assumptions/Hi,
how can I recognize an equality from an inequality, in a list of assumptions?
thanks, danieleSun, 03 Jan 2016 14:49:04 +0100https://ask.sagemath.org/question/32008/