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Informal description: ""

{λ[sigma:Set] .​ λ[s0:sigma] .​ λ[t0:sigma]} .​ <{({(t0) .​ (s0) .​ (sigma)} .​ wissel ) .​ (sigma) .​ (sigma)} .​ bijective > .​ {({(t0) .​ (s0) .​ (sigma)} .​ th2 ) .​ ({(t0) .​ (s0) .​ (sigma)} .​ th1 ) .​ ({({(t0) .​ (s0) .​ (sigma)} .​ wissel ) .​ (sigma) .​ (sigma)} .​ surjective ) .​ ({({(t0) .​ (s0) .​ (sigma)} .​ wissel ) .​ (sigma) .​ (sigma)} .​ injective )} .​ andi

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