Trouble creating an array of unit vectors when one of them has negative scalar coefficient about directsum.jl HOT 2 CLOSED

The issue is now fixed on DirectSum v0.5.5

julia> [-v1,v1]
2-element Array{Simplex{⟨∞∅+++⟩,1,v₁,Number},1}:
 -1v₁
  1v₁

However, the type promotion results in Simplex{V,G,B,Number}, which is not the best for performance. If you want to get the best performance, you should manually promote the SubManifold element to an element of Simplex{V,G,B,Int64} for type stability.

from directsum.jl.

Ah yes, I need to resolve that method ambiguity.

As an alternative, you can do the following at the moment:

julia> [Chain(-1v1),Chain(v1)]
2-element Array{Chain{⟨∞∅+++⟩,1,Int64,5},1}:
 0v∞ + 0v∅ - 1v₁ + 0v₂ + 0v₃
 0v∞ + 0v∅ + 1v₁ + 0v₂ + 0v₃

This is a bug with DirectSum, not Grassmann so I'm transferring the issue.

from directsum.jl.