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Informal description: ""

{λ[x: nat ] .​ λ[n:{( 1 ) .​ (x)} .​ nis ]} .​ <(λ[u: nat ] .​ {((u) .​ suc ) .​ (x)} .​ is ) .​ some > .​ {(n) .​ ((x) .​ t4 ) .​ ((λ[u: nat ] .​ {((u) .​ suc ) .​ (x)} .​ is ) .​ some ) .​ ({( 1 ) .​ (x)} .​ is )} .​ ore2

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