reserve a,a1,a2,v,v1,v2,x for object;
reserve V,A for set;
reserve m,n for Nat;
reserve S,S1,S2 for FinSequence;
reserve D,D1,D2 for NonatomicND of V,A;

theorem
  D1 tolerates D2 implies D1 +* D2 is NonatomicND of V,A
  proof
    assume
A1: D1 tolerates D2;
    then D1 \/ D2 = D1 +* D2 by FUNCT_4:30;
    hence thesis by A1,Th36;
  end;
