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Informal description: ""

{λ[x: nat ] .​ λ[y: nat ] .​ λ[l:{({( 1 ) .​ (x)} .​ pl ) .​ (y)} .​ less ]} .​ <{(x) .​ (y)} .​ lessis > .​ {({(l) .​ (y) .​ (x)} .​ t2 ) .​ (x) .​ (y)} .​ satz10e

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