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Informal description: ""

{λ[x: nat ] .​ λ[y: nat ] .​ λ[z: nat ] .​ λ[m:{(y) .​ (x)} .​ more ] .​ λ[n:{(z) .​ (y)} .​ more ]} .​ <{(z) .​ (x)} .​ more > .​ {(m) .​ (n) .​ (x) .​ (y) .​ (z)} .​ satz15

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