 reserve o,o1,o2 for object;
 reserve n for Ordinal;
 reserve R,L for non degenerated comRing;
 reserve b for bag of 1;

theorem
   for R holds BSPoly(R) is RingIsomorphism &
   Polynom-Ring R is (Polynom-Ring(1,R))-isomorphic
   proof
     let R;
     BSPoly(R) is RingHomomorphism & BSPoly(R) is isomorphism;
     hence thesis by RING_3:def 4;
   end;
