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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[p:∀[x:sigma] .​ Prop] .​ λ[s:sigma] .​ λ[t:sigma] .​ λ[sp:(s) .​ p] .​ λ[i:{(s) .​ (t) .​ (sigma)} .​ is ]} .​ <(t) .​ p> .​ {({(i) .​ (s) .​ (t) .​ (sigma)} .​ symis ) .​ (sp) .​ (t) .​ (s) .​ (p) .​ (sigma)} .​ isp

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