reserve p,p1,p2,p3,q,q1,q2 for Point of TOP-REAL 2,
  i for Nat,
  lambda for Real;

theorem Th35:
  {q: -1=q`1 & -1<=q`2 & q`2<=1 or q`1=1 & -1<=q`2 & q`2<=1
  or -1=q`2 & -1<=q`1 & q`1<=1 or 1=q`2 & -1<=q`1 & q`1<=1}
  = {p: p`1=-1 & -1 <=p`2 & p`2<=1 or p`2=1 & -1<=p`1 & p`1<=1 or
  p`1=1 & -1 <=p`2 & p`2<=1 or p`2=-1 & -1<=p`1 & p`1<=1}
proof
  thus {q: -1=q`1 & -1<=q`2 & q`2<=1 or q`1=1 & -1<=q`2 & q`2<=1
  or -1=q`2 & -1<=q`1 & q`1<=1 or 1=q`2 & -1<=q`1 & q`1<=1}
  c= {p: p`1=-1 & -1 <=p`2 & p`2<=1 or p`2=1 & -1<=p`1 & p`1<=1 or
  p`1=1 & -1 <=p`2 & p`2<=1 or p`2=-1 & -1<=p`1 & p`1<=1}
  proof
    let x be object;
    assume x in {q: -1=q`1 & -1<=q`2 & q`2<=1 or q`1=1 & -1<=q`2 & q`2<=1
    or -1=q`2 & -1<=q`1 & q`1<=1 or 1=q`2 & -1<=q`1 & q`1<=1};
    then ex q st ( x=q)&( -1=q`1 & -1<=q`2 & q`2<=1 or q`1=1 & -1<=q
    `2 & q`2<=1 or -1=q`2 & -1<=q`1 & q`1<=1 or 1=q`2 & -1<=q`1 & q`1<=1);
    hence thesis;
  end;
  thus {p: p`1=-1 & -1 <=p`2 & p`2<=1 or p`2=1 & -1<=p`1 & p`1<=1 or
  p`1=1 & -1 <=p`2 & p`2<=1 or p`2=-1 & -1<=p`1 & p`1<=1}
  c= {q: -1=q`1 & -1<=q`2 & q`2<=1 or q`1=1 & -1<=q`2 & q`2<=1
  or -1=q`2 & -1<=q`1 & q`1<=1 or 1=q`2 & -1<=q`1 & q`1<=1}
  proof
    let x be object;
    assume x in {p: p`1=-1 & -1 <=p`2 & p`2<=1 or p`2=1 & -1<=p`1 & p`1<=1 or
    p`1=1 & -1 <=p`2 & p`2<=1 or p`2=-1 & -1<=p`1 & p`1<=1};
    then ex p st ( p=x)&( p`1=-1 & -1 <=p`2 & p`2<=1 or p`2=1 & -1<=
    p`1 & p`1<=1 or p`1=1 & -1 <=p`2 & p`2<=1 or p`2=-1 & -1<=p`1 & p`1<=1);
    hence thesis;
  end;
end;
