% Mizar problem: t57_classes1,classes1,1656,36 
fof(t57_classes1, conjecture,  (! [A] :  (v3_ordinal1(A) => k5_classes1(A)=A) ) ).
fof(cc2_ordinal1, axiom,  (! [A] :  ( (v1_ordinal1(A) & v2_ordinal1(A))  => v3_ordinal1(A)) ) ).
fof(rc1_ordinal1, axiom,  (? [A] :  (v1_ordinal1(A) & v2_ordinal1(A)) ) ).
fof(dt_k5_classes1, axiom, $true).
fof(cc1_ordinal1, axiom,  (! [A] :  (v3_ordinal1(A) =>  (v1_ordinal1(A) & v2_ordinal1(A)) ) ) ).
fof(fc3_classes1, axiom,  (! [A] : v1_ordinal1(k5_classes1(A))) ).
fof(rc2_ordinal1, axiom,  (? [A] : v3_ordinal1(A)) ).
fof(t55_classes1, axiom,  (! [A] :  (v1_ordinal1(A) => k5_classes1(A)=A) ) ).
