DiscreteMath Sections DiscrMathExt Doc
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Def  EquivRel x,y:T. E(x;y)
Def  == Refl(T;x,y.E(x;y)) & (Sym x,y:T. E(x;y)) & (Trans x,y:T. E(x;y))

is mentioned by

Thm*  (q:A/E{x:A| q = x  A/E }) ~ A[card_quotient]
Thm*  EquivRel X,Y:Type. X ~ Y[one_one_corr_is_equiv_rel]

In prior sections: rel 1 quot 1 LogicSupplement num thy 1

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DiscreteMath Sections DiscrMathExt Doc