In Google Groups, I can’t see the screenshot nor the notebook, but this is a FAQ, so I risk an answer :
solve, used without algorithm= uses Maxima’s solver. The latter may introduce new variables to denote unknown, arbitrary, quantities : “zxxx” denote integer arbitrary constants, “rxxx” denoting real or complex arbitrary constants. But… … the Sage interface to Maxima doesn’t catch them and does not define them in Sage. You have to catch them and declare them yourself. A quick and crude way to catch undefined variables in an expression E is [u for u in E.variables() if str(u) not in globals()] ; declaring them may use var(str(u)). HTH, Le jeudi 12 janvier 2023 à 21:40:48 UTC+1, brad...@ntlworld.com a écrit : > My mistake, here is the screenshot > > On Thursday, January 12, 2023 at 8:14:20 PM UTC dim...@gmail.com wrote: > >> On Thu, Jan 12, 2023 at 8:00 PM 'Charles Bradshaw' via sage-support >> <sage-s...@googlegroups.com> wrote: >> > >> > In the attached screenshot line 'out [113]' and 'out [98]' please >> observe 2*pi*z5484 >> > the attempt to evaluate: line [114] produces the error x5484 is not >> defined >> >> there is no attachment. >> >> >> > >> > is this a bug or did I not understand something? >> > >> > I am running Fedora 37 with the dnf installed >> > SageMath version 9.6, Release Date: 2022-05-15 >> > Using Python 3.11.1. >> > >> > Thanks >> > >> > -- >> > You received this message because you are subscribed to the Google >> Groups "sage-support" group. >> > To unsubscribe from this group and stop receiving emails from it, send >> an email to sage-support...@googlegroups.com. >> > To view this discussion on the web visit >> https://groups.google.com/d/msgid/sage-support/e870bef7-68db-49a5-b45a-5508c039caf3n%40googlegroups.com. >> >> >> > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/283777a5-40f2-4b95-ad85-f28ad3315d21n%40googlegroups.com.
