https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/CStarAlgebra/ContinuousMap.html
Mathlib.Analysis.CStarAlgebra.ContinuousMap
mathlibanalysis
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/ContinuousMap/StoneWeierstrass.html
Mathlib.Topology.ContinuousMap.StoneWeierstrass
mathlibtopology