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Informal description: ""

{λ[x: frac ] .​ λ[y: frac ] .​ λ[z: frac ] .​ λ[f:{({(y) .​ (z)} .​ pf ) .​ ({(x) .​ (z)} .​ pf )} .​ lessf ]} .​ <{(y) .​ (x)} .​ lessf > .​ {({(f) .​ ({(y) .​ (z)} .​ compf ) .​ ({(x) .​ (z)} .​ compf ) .​ ({(z) .​ (y)} .​ pf ) .​ ({(y) .​ (z)} .​ pf ) .​ ({(z) .​ (x)} .​ pf ) .​ ({(x) .​ (z)} .​ pf )} .​ eqlessf12 ) .​ (z) .​ (y) .​ (x)} .​ satz63c

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