
theorem Th28:
for n be non zero Nat, X be non-empty (n+1)-element FinSequence,
 S be sigmaFieldFamily of X, M be sigmaMeasureFamily of S holds
  Prod_Measure M = Prod_Measure(Prod_Measure SubFin(M,n),ElmFin(M,n+1))
proof
    let n be non zero Nat, X be non-empty (n+1)-element FinSequence,
    S be sigmaFieldFamily of X, M be sigmaMeasureFamily of S;
    Prod_Measure M
     = product_sigma_Measure(Prod_Measure SubFin(M,n),ElmFin(M,n+1))
      by Th25;
    hence thesis by MESFUN12:def 9;
end;
