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Informal description: ""

{λ[x: nat ] .​ λ[y: nat ] .​ λ[z: nat ] .​ λ[l:{({(y) .​ (z)} .​ pl ) .​ ({(x) .​ (z)} .​ pl )} .​ less ]} .​ <{(y) .​ (x)} .​ less > .​ {({(l) .​ ({(y) .​ (z)} .​ compl ) .​ ({(x) .​ (z)} .​ compl ) .​ ({(z) .​ (y)} .​ pl ) .​ ({(y) .​ (z)} .​ pl ) .​ ({(z) .​ (x)} .​ pl ) .​ ({(x) .​ (z)} .​ pl )} .​ isless12 ) .​ (z) .​ (y) .​ (x)} .​ satz20c

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