% Mizar problem: t53_enumset1,enumset1,705,5 
fof(t53_enumset1, conjecture,  (! [A] :  (! [B] :  (! [C] : k6_enumset1(A, A, A, A, A, A, B, C)=k1_enumset1(A, B, C)) ) ) ).
fof(dt_k1_enumset1, axiom, $true).
fof(dt_k2_enumset1, axiom, $true).
fof(dt_k6_enumset1, axiom, $true).
fof(t31_enumset1, axiom,  (! [A] :  (! [B] :  (! [C] : k2_enumset1(A, A, B, C)=k1_enumset1(A, B, C)) ) ) ).
fof(t50_enumset1, axiom,  (! [A] :  (! [B] :  (! [C] :  (! [D] : k6_enumset1(A, A, A, A, A, B, C, D)=k2_enumset1(A, B, C, D)) ) ) ) ).
