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citations	visibility	version 1	version 1	(static HELM directory)	helena

Informal description: ""

{λ[a:Prop] .​ λ[ksi:Set] .​ λ[x:ksi] .​ λ[y:ksi] .​ λ[n:(a) .​ not ]} .​ <{({(x) .​ (y) .​ (ksi)} .​ is ) .​ (a)} .​ imp > .​ {(n) .​ ({(x) .​ (y) .​ (ksi)} .​ is ) .​ (a)} .​ th2

Validation parameters: sort hierarchy = "Z2", kernel options = ""