src/ZF/AC/AC_Equiv.thy
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    10 Some Isabelle proofs of equivalences of these axioms are formalizations of
    10 Some Isabelle proofs of equivalences of these axioms are formalizations of
    11 proofs presented by the Rubins.  The others are based on the Rubins' proofs,
    11 proofs presented by the Rubins.  The others are based on the Rubins' proofs,
    12 but slightly changed.
    12 but slightly changed.
    13 *)
    13 *)
    14 
    14 
    15 AC_Equiv = CardinalArith + Univ + OrdQuant +
    15 AC_Equiv = CardinalArith + Univ + 
    16 
    16 
    17 consts
    17 consts
    18   
    18   
    19 (* Well Ordering Theorems *)
    19 (* Well Ordering Theorems *)
    20   WO1, WO2, WO3, WO5, WO6, WO7, WO8 :: o
    20   WO1, WO2, WO3, WO5, WO6, WO7, WO8 :: o