% Mizar problem: t17_exchsort,exchsort,513,4 
fof(t17_exchsort, conjecture,  (! [A] :  ( (v1_relat_1(A) & v1_funct_1(A))  => v3_exchsort(A, k2_exchsort(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(rc1_ordinal6, axiom,  (? [A] : v1_ordinal6(A)) ).
fof(cc1_ordinal1, axiom,  (! [A] :  (v3_ordinal1(A) =>  (v1_ordinal1(A) & v2_ordinal1(A)) ) ) ).
fof(cc1_ordinal6, axiom,  (! [A] :  (v3_ordinal1(A) => v1_ordinal6(A)) ) ).
fof(rc2_ordinal1, axiom,  (? [A] : v3_ordinal1(A)) ).
fof(dt_k2_exchsort, axiom,  (! [A] :  ( (v1_relat_1(A) & v1_funct_1(A))  => v3_ordinal1(k2_exchsort(A))) ) ).
fof(dt_k3_ordinal2, axiom,  (! [A] : v3_ordinal1(k3_ordinal2(A))) ).
fof(dt_k9_xtuple_0, axiom, $true).
fof(rc1_funct_1, axiom,  (? [A] :  (v1_relat_1(A) & v1_funct_1(A)) ) ).
fof(t16_exchsort, axiom,  (! [A] :  ( (v1_relat_1(A) & v1_funct_1(A))  => k2_exchsort(A)=k3_ordinal2(k9_xtuple_0(A))) ) ).
