Thank you. Now to report the bug. On Wednesday, June 20, 2018 at 11:15:36 AM UTC-7, Nils Bruin wrote: > > On Wednesday, June 20, 2018 at 10:12:24 AM UTC-7, Richard_L wrote: >> >> ..."domain:complex" is not the default for which code: Maxima or Sage? >> > > it's a maxima command, so: default for maxima. Sage uses maxima with > non-default settings. > > >> >> Sage's documentation [ >> https://doc.sagemath.org/html/en/reference/calculus/sage/calculus/var.html] >> states >> >> By default, var returns a complex variable. To define real or positive >>> variables we can specify the domain as: ... >>> >> >> My understanding of the implementation (although I cannot find it in the >> code) is that Sage sets up "domain:complex" for Maxima quite early.The fact >> that we can override this in the first few lines of the script (above the >> variable declarations) indicates to me that it happens before I get the >> sage prompt. (Otherwise the override would get stomped on.) >> > > Strictly speaking: not before the prompt. The maxima-_lib library only > gets initialized upon the first call (you can notice this by the time it > takes to do the first operation in a session that uses maxima). However, > the interface is initialized by the time maxima_calculus.eval(...) gets to > do its thing, so therefore the setting survives. > > The code is here: > > > https://github.com/sagemath/sage/blob/854f9764d14236110b8d7f7b35a7d52017e044f8/src/sage/interfaces/maxima_lib.py#L167 > >
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