% Mizar problem: t41_rewrite1,rewrite1,947,25 
fof(t41_rewrite1, conjecture,  (! [A] :  (v1_relat_1(A) =>  (! [B] :  (! [C] :  (r6_rewrite1(A, B, C) => r6_rewrite1(A, C, B)) ) ) ) ) ).
fof(d8_rewrite1, axiom,  (! [A] :  (v1_relat_1(A) =>  (! [B] :  (! [C] :  (r6_rewrite1(A, B, C) <=>  (? [D] :  (r1_rewrite1(A, D, B) & r1_rewrite1(A, D, C)) ) ) ) ) ) ) ).
