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[i:{(t0) .​ (s0) .​ (sigma)} .​ incl ] .​ λ[s:sigma] .​ λ[ses0:{(s0) .​ (s) .​ (sigma)} .​ esti ]} .​ <{(t0) .​ (s) .​ (sigma)} .​ esti > .​ (ses0) .​ (s) .​ i

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