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Informal description: ""

{λ[x0: rat ] .​ λ[y0: rat ] .​ λ[z0: rat ] .​ λ[u0: rat ] .​ λ[i:{(y0) .​ (x0)} .​ is ] .​ λ[j:{(u0) .​ (z0)} .​ is ]} .​ <{({(u0) .​ (y0)} .​ ts ) .​ ({(z0) .​ (x0)} .​ ts )} .​ is > .​ {({(j) .​ (y0) .​ (u0) .​ (z0)} .​ ists2 ) .​ ({(i) .​ (z0) .​ (y0) .​ (x0)} .​ ists1 ) .​ ({(u0) .​ (y0)} .​ ts ) .​ ({(z0) .​ (y0)} .​ ts ) .​ ({(z0) .​ (x0)} .​ ts ) .​ ( rat )} .​ tris

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