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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[x: frac ] .​ λ[y: frac ] .​ λ[z: frac ] .​ λ[l:{(y) .​ (x)} .​ lessf ]} .​ <{({(z) .​ (y)} .​ pf ) .​ ({(z) .​ (x)} .​ pf )} .​ lessf > .​ {({({(l) .​ (y) .​ (x)} .​ satz43 ) .​ (z) .​ (x) .​ (y)} .​ satz61 ) .​ ({(z) .​ (x)} .​ pf ) .​ ({(z) .​ (y)} .​ pf )} .​ satz42

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