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Informal description: ""

{λ[x: nat ] .​ λ[y: nat ] .​ λ[u: nat ] .​ λ[v: nat ] .​ λ[du:{(u) .​ (y) .​ (x)} .​ diffprop ] .​ λ[dv:{(v) .​ (y) .​ (x)} .​ diffprop ]} .​ <{(v) .​ (u)} .​ is > .​ {({(dv) .​ (du) .​ (x) .​ ({(v) .​ (y)} .​ pl ) .​ ({(u) .​ (y)} .​ pl ) .​ ( nat )} .​ tris1 ) .​ (v) .​ (u) .​ (y)} .​ satz8a

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