reserve D for non empty set,
  i,j,k,l for Nat,
  n for Nat,
  x for set,
  a,b,c,r,r1,r2 for Real,
  p,q for FinSequence of REAL,
  MR,MR1 for Matrix of REAL;

theorem Th45:
  for p,q being ProbFinS FinSequence of REAL holds Mx2FinS((
  ColVec2Mx p) * (LineVec2Mx q)) is ProbFinS
by Th23,Th44;
