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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: nat ] .​ λ[y: nat ]} .​ <{(λ[z: nat ] .​ {({(z) .​ (y)} .​ pl ) .​ (x)} .​ is ) .​ ( nat )} .​ amone > .​ λ[u: nat ] .​ λ[v: nat ] .​ λ[du:{(u) .​ (y) .​ (x)} .​ diffprop ] .​ λ[dv:{(v) .​ (y) .​ (x)} .​ diffprop ] .​ {(dv) .​ (du) .​ (v) .​ (u) .​ (y) .​ (x)} .​ t5

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