% Mizar problem: t48_extreal2,extreal2,1104,40 
fof(t48_extreal2,conjecture,(
    ! [A] : 
      ( m1_subset_1(A,k3_supinf_1)
     => ! [B] : 
          ( m1_subset_1(B,k3_supinf_1)
         => ( ~ ( ~ r1_supinf_1(k3_supinf_2(B),A)
                & r1_supinf_1(k3_supinf_2(A),B) )
            & ~ ( ~ r1_supinf_1(k3_supinf_2(A),B)
                & r1_supinf_1(k3_supinf_2(B),A) )
            & ~ ( ~ r1_supinf_1(B,k3_supinf_2(A))
                & r1_supinf_1(A,k3_supinf_2(B)) )
            & ~ ( ~ r1_supinf_1(A,k3_supinf_2(B))
                & r1_supinf_1(B,k3_supinf_2(A)) ) ) ) ) ),
    inference(mizar_bg_added,[status(thm)],[connectedness_r1_supinf_1,dt_k3_supinf_1,dt_k3_supinf_2,dt_m1_subset_1,existence_m1_subset_1,involutiveness_k3_supinf_2,reflexivity_r1_supinf_1,t17_supinf_2]),
    [file(extreal2,t48_extreal2)]).

fof(connectedness_r1_supinf_1,axiom,(
    ! [A,B] : 
      ( ( m1_subset_1(A,k3_supinf_1)
        & m1_subset_1(B,k3_supinf_1) )
     => ( r1_supinf_1(A,B)
        | r1_supinf_1(B,A) ) ) ),
    file(supinf_1,r1_supinf_1),
    []).

fof(dt_k3_supinf_1,axiom,(
    $true ),
    file(supinf_1,k3_supinf_1),
    []).

fof(dt_k3_supinf_2,axiom,(
    ! [A] : 
      ( m1_subset_1(A,k3_supinf_1)
     => m1_subset_1(k3_supinf_2(A),k3_supinf_1) ) ),
    file(supinf_2,k3_supinf_2),
    []).

fof(dt_m1_subset_1,axiom,(
    $true ),
    file(subset_1,m1_subset_1),
    []).

fof(existence_m1_subset_1,axiom,(
    ! [A] : 
    ? [B] : m1_subset_1(B,A) ),
    file(subset_1,m1_subset_1),
    []).

fof(involutiveness_k3_supinf_2,axiom,(
    ! [A] : 
      ( m1_subset_1(A,k3_supinf_1)
     => k3_supinf_2(k3_supinf_2(A)) = A ) ),
    file(supinf_2,k3_supinf_2),
    []).

fof(reflexivity_r1_supinf_1,axiom,(
    ! [A,B] : 
      ( ( m1_subset_1(A,k3_supinf_1)
        & m1_subset_1(B,k3_supinf_1) )
     => r1_supinf_1(A,A) ) ),
    file(supinf_1,r1_supinf_1),
    []).

fof(t17_supinf_2,axiom,(
    ! [A] : 
      ( m1_subset_1(A,k3_supinf_1)
     => ! [B] : 
          ( m1_subset_1(B,k3_supinf_1)
         => ( ~ ( ~ r1_supinf_1(B,A)
                & r1_supinf_1(k3_supinf_2(A),k3_supinf_2(B)) )
            & ~ ( ~ r1_supinf_1(k3_supinf_2(A),k3_supinf_2(B))
                & r1_supinf_1(B,A) ) ) ) ) ),
    file(supinf_2,t17_supinf_2),
    []).