The Riesz–Kantorovich formula for lexicographically ordered spaces
The Riesz–Kantorovich formula for lexicographically ordered spaces
If L and M are partially ordered vector spaces, then one can consider regular linear maps from L to M, i.e. linear maps which can be written as the difference of two positive linear maps. If the space L is directed, then the space $$L^r(L,M)$$ of all regular linear operators …