The existence of a measure-preserving bijection from a unit square to a   unit segment
  In this paper, we prove the existence of a measure-preserving bijection from unit square to unit segment. This bijection is also called the probability isomorphism between two probability spaces. Then we give a new proof of the existence of the independent random variables on Borel probability space $([0,1],\B([0,1]),\Lb)$ that their distribution functions are the given distribution functions. 
Cong Dan Pham
math.PR