摘要: Let L be an orthoalgebra, and let ??(L) the complete lattice of filters on L.We describe a natural mapping Δ: × → that specializes to thefamiliar Sasaki map in case is orthomodular lattice. The mappingΔ related generalized Bennett Foulis. twomappings are essentially same if poset, but can quitedifferent even for rather well-behaved orthoalgebras.