Thm* T:Type, E:(TTProp). (EquivRel x,y:T. E(x,y)) Prop
Thm* T:Type, E:(TTProp). Trans x,y:T. E(x,y) Prop
Thm* T:Type, E:(TTProp). Sym x,y:T. E(x,y) Prop
Thm* T:Type, E:(TTProp). Refl(T;x,y.E(x,y)) Prop
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