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: ""

<∀[x: frac ] .​ ∀[y: frac ] .​ ∀[t:(y) .​ (x) .​ eq ] .​ (x) .​ (y) .​ eq > .​ λ[x: frac ] .​ λ[y: frac ] .​ λ[t:(y) .​ (x) .​ eq ] .​ {(t) .​ (y) .​ (x)} .​ symeq

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