% Mizar problem: t13_projpl_1,projpl_1,381,2 
fof(t13_projpl_1, conjecture,  (! [A] :  (l1_incsp_1(A) =>  (! [B] :  (m1_subset_1(B, u1_incsp_1(A)) =>  (! [C] :  (m1_subset_1(C, u1_incsp_1(A)) =>  (! [D] :  (m1_subset_1(D, u1_incsp_1(A)) =>  (! [E] :  (m1_subset_1(E, u1_incsp_1(A)) =>  (r5_projpl_1(A, B, C, D, E) =>  (r5_projpl_1(A, B, D, C, E) &  (r5_projpl_1(A, C, B, D, E) &  (r5_projpl_1(A, C, D, B, E) &  (r5_projpl_1(A, D, B, C, E) &  (r5_projpl_1(A, D, C, B, E) &  (r5_projpl_1(A, B, C, E, D) &  (r5_projpl_1(A, B, D, E, C) &  (r5_projpl_1(A, C, B, E, D) &  (r5_projpl_1(A, C, D, E, B) &  (r5_projpl_1(A, D, B, E, C) &  (r5_projpl_1(A, D, C, E, B) &  (r5_projpl_1(A, B, E, C, D) &  (r5_projpl_1(A, B, E, D, C) &  (r5_projpl_1(A, C, E, B, D) &  (r5_projpl_1(A, C, E, D, B) &  (r5_projpl_1(A, D, E, B, C) &  (r5_projpl_1(A, D, E, C, B) &  (r5_projpl_1(A, E, B, C, D) &  (r5_projpl_1(A, E, B, D, C) &  (r5_projpl_1(A, E, C, B, D) &  (r5_projpl_1(A, E, C, D, B) &  (r5_projpl_1(A, E, D, B, C) & r5_projpl_1(A, E, D, C, B)) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ).
fof(dt_k1_enumset1, axiom, $true).
fof(dt_k1_zfmisc_1, axiom, $true).
fof(redefinition_k8_domain_1, axiom,  (! [A, B, C, D] :  ( ( ~ (v1_xboole_0(A))  &  (m1_subset_1(B, A) &  (m1_subset_1(C, A) & m1_subset_1(D, A)) ) )  => k8_domain_1(A, B, C, D)=k1_enumset1(B, C, D)) ) ).
fof(dt_k8_domain_1, axiom,  (! [A, B, C, D] :  ( ( ~ (v1_xboole_0(A))  &  (m1_subset_1(B, A) &  (m1_subset_1(C, A) & m1_subset_1(D, A)) ) )  => m1_subset_1(k8_domain_1(A, B, C, D), k1_zfmisc_1(A))) ) ).
fof(dt_u2_incsp_1, axiom,  (! [A] :  (l1_incsp_1(A) =>  ~ (v1_xboole_0(u2_incsp_1(A))) ) ) ).
fof(existence_l1_incsp_1, axiom,  (? [A] : l1_incsp_1(A)) ).
fof(existence_m1_subset_1, axiom,  (! [A] :  (? [B] : m1_subset_1(B, A)) ) ).
fof(dt_l1_incsp_1, axiom, $true).
fof(dt_m1_subset_1, axiom, $true).
fof(dt_u1_incsp_1, axiom,  (! [A] :  (l1_incsp_1(A) =>  ~ (v1_xboole_0(u1_incsp_1(A))) ) ) ).
fof(d5_projpl_1, axiom,  (! [A] :  (l1_incsp_1(A) =>  (! [B] :  (m1_subset_1(B, u1_incsp_1(A)) =>  (! [C] :  (m1_subset_1(C, u1_incsp_1(A)) =>  (! [D] :  (m1_subset_1(D, u1_incsp_1(A)) =>  (r4_projpl_1(A, B, C, D) <=>  (? [E] :  (m1_subset_1(E, u2_incsp_1(A)) & r4_incsp_1(A, k8_domain_1(u1_incsp_1(A), B, C, D), E)) ) ) ) ) ) ) ) ) ) ) ).
fof(d6_projpl_1, axiom,  (! [A] :  (l1_incsp_1(A) =>  (! [B] :  (m1_subset_1(B, u1_incsp_1(A)) =>  (! [C] :  (m1_subset_1(C, u1_incsp_1(A)) =>  (! [D] :  (m1_subset_1(D, u1_incsp_1(A)) =>  (! [E] :  (m1_subset_1(E, u1_incsp_1(A)) =>  (r5_projpl_1(A, B, C, D, E) <=>  ( ~ (r4_projpl_1(A, B, C, D))  &  ( ~ (r4_projpl_1(A, C, D, E))  &  ( ~ (r4_projpl_1(A, D, E, B))  &  ~ (r4_projpl_1(A, E, B, C)) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ).
fof(t11_projpl_1, axiom,  (! [A] :  (l1_incsp_1(A) =>  (! [B] :  (m1_subset_1(B, u1_incsp_1(A)) =>  (! [C] :  (m1_subset_1(C, u1_incsp_1(A)) =>  (! [D] :  (m1_subset_1(D, u1_incsp_1(A)) =>  (r4_projpl_1(A, B, C, D) =>  (r4_projpl_1(A, B, D, C) &  (r4_projpl_1(A, C, B, D) &  (r4_projpl_1(A, C, D, B) &  (r4_projpl_1(A, D, B, C) & r4_projpl_1(A, D, C, B)) ) ) ) ) ) ) ) ) ) ) ) ) ).
