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[x: frac ] .​ λ[y: frac ] .​ λ[v: frac ] .​ λ[w: frac ] .​ λ[e:{(x) .​ ({(v) .​ (y)} .​ tf )} .​ eq ] .​ λ[f:{(x) .​ ({(w) .​ (y)} .​ tf )} .​ eq ]} .​ <{(w) .​ (v)} .​ eq > .​ {({(f) .​ (e) .​ (x) .​ ({(w) .​ (y)} .​ tf ) .​ ({(v) .​ (y)} .​ tf )} .​ treq2 ) .​ (y) .​ (w) .​ (v)} .​ satz73e

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