% Mizar problem: t3_finset_1,finset_1,351,38 
fof(t3_finset_1, conjecture,  (! [A] :  (! [B] :  (v1_finset_1(A) => v1_finset_1(k3_xboole_0(A, B))) ) ) ).
fof(commutativity_k3_xboole_0, axiom,  (! [A, B] : k3_xboole_0(A, B)=k3_xboole_0(B, A)) ).
fof(idempotence_k3_xboole_0, axiom,  (! [A, B] : k3_xboole_0(A, A)=A) ).
fof(dt_k3_xboole_0, axiom, $true).
fof(fc10_finset_1, axiom,  (! [A, B] :  (v1_finset_1(B) => v1_finset_1(k3_xboole_0(A, B))) ) ).
fof(fc11_finset_1, axiom,  (! [A, B] :  (v1_finset_1(A) => v1_finset_1(k3_xboole_0(A, B))) ) ).
