reserve m,j,p,q,n,l for Element of NAT;
reserve e1,e2 for ExtReal;
reserve i for Nat,
        k,k1,k2,j1 for Element of NAT,
        x,x1,x2,y for set;
reserve p1,p2 for FinSequence;

theorem
  for p1 being FinSequence, p2 being FinSubsequence st i >= len p1
  holds p1 misses Shift(p2,i)
proof
  let p1 be FinSequence, p2 be FinSubsequence;
  assume i >= len p1;
  then dom p1 misses dom Shift(p2,i) by Th47;
  hence thesis by RELAT_1:179   ;
end;
