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Informal description: ""

{λ[sigma:Set] .​ λ[tau:Set] .​ λ[f:Π[x:sigma] .​ tau] .​ λ[g:Π[x:sigma] .​ tau] .​ λ[i:{(g) .​ (f) .​ (Π[x:sigma] .​ tau)} .​ is ] .​ λ[s:sigma]} .​ <{((s) .​ g) .​ ((s) .​ f) .​ (tau)} .​ is > .​ {(i) .​ ({((s) .​ f) .​ (tau)} .​ refis ) .​ (g) .​ (f) .​ (λ[y:Π[x:sigma] .​ tau] .​ {((s) .​ y) .​ ((s) .​ f) .​ (tau)} .​ is ) .​ (Π[x:sigma] .​ tau)} .​ isp

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