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[a:Prop] .​ λ[b:Prop] .​ λ[o:{(b) .​ (a)} .​ orec ]} .​ <{(a) .​ (b)} .​ orec > .​ {({({(o) .​ (b) .​ (a)} .​ orece2 ) .​ (b) .​ (a)} .​ comec ) .​ ({({(o) .​ (b) .​ (a)} .​ orece1 ) .​ (b) .​ (a)} .​ comor ) .​ (a) .​ (b)} .​ oreci

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