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Informal description: ""

{λ[x: nat ] .​ λ[y: nat ] .​ λ[p:{(y) .​ (x)} .​ prop1 ]} .​ <{((y) .​ suc ) .​ (x)} .​ prop1 > .​ {({(y) .​ (x)} .​ satz4b ) .​ ({(p) .​ (y) .​ (x)} .​ t3 ) .​ ({((y) .​ suc ) .​ (x)} .​ pl ) .​ (({(y) .​ (x)} .​ pl ) .​ suc ) .​ ((y) .​ suc ) .​ ( nat )} .​ th4

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