https://github.com/chakravala/Grassmann.jl/commit/02472f0f7c72a41d5ff0c1dba37b6fa4417ccfa2
julia> using Grassmann; basis"3"
(⟨+++⟩, v, v₁, v₂, v₃, v₁₂, v₁₃, v₂₃, v₁₂₃)
julia> OG = Chain(1.0v1):(0.2v2+0.2v3):(1.0v1+v2+v3)
(1.0v₁ + 0.0v₂ + 0.0v₃):(0.0v₁ + 0.2v₂ + 0.2v₃):(1.0v₁ + 1.0v₂ + 1.0v₃)