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Informal description: ""

{λ[x: nat ] .​ λ[y: nat ] .​ λ[z: nat ] .​ λ[u: nat ] .​ λ[m:{(y) .​ (x)} .​ more ] .​ λ[n:{(u) .​ (z)} .​ more ]} .​ <{({(u) .​ (y)} .​ pl ) .​ ({(z) .​ (x)} .​ pl )} .​ more > .​ {({(n) .​ (m) .​ (u) .​ (z) .​ (y) .​ (x)} .​ t2 ) .​ ({(n) .​ (m) .​ (u) .​ (z) .​ (y) .​ (x)} .​ t1 ) .​ ({(u) .​ (y)} .​ pl ) .​ ({(z) .​ (y)} .​ pl ) .​ ({(z) .​ (x)} .​ pl )} .​ trmore

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