home	news	documentation	specification		implementation
foreword	milestones	version 2	version 2	(background - core - applications)	library	(static LDDL directory)
citations	visibility	version 1	version 1	(static HELM directory)	helena

Informal description: ""

{λ[sigma:Set] .​ λ[s0:(sigma) .​ set ] .​ λ[t0:(sigma) .​ set ] .​ λ[n:({(t0) .​ (s0) .​ ((sigma) .​ set )} .​ is ) .​ not ] .​ λ[m:({(λ[x:sigma] .​ {(x) .​ (t0) .​ (s0) .​ (sigma)} .​ nissetprop ) .​ (sigma)} .​ some ) .​ not ] .​ λ[l:{(λ[x:sigma] .​ {(x) .​ (s0) .​ (t0) .​ (sigma)} .​ nissetprop ) .​ (sigma)} .​ none ] .​ λ[s:sigma]} .​ <({(s) .​ (s0) .​ (t0) .​ (sigma)} .​ nissetprop ) .​ not > .​ (s) .​ l

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