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.Sat, 08 May 2021 21:44:28 +0200How to use faces of a polytope as variables?https://ask.sagemath.org/question/57027/how-to-use-faces-of-a-polytope-as-variables/ Hello, I am very new to using computer algebras system, and I can't figure out the following: I need to create a 3D polytope (in fact, an associahedron) and then do some computations in the algebra of rational functions in variables that correspond to faces of associahedron. How do I do that? I know writing something like Frac(ZZ['x,y,z']) creates the algebra that I need, but how do I make formal symbols x,y,z remember that they once were faces of a polytope (so that I could check if one was a subface of another, or something like that...)?PolydaryaSat, 08 May 2021 21:44:28 +0200https://ask.sagemath.org/question/57027/