  This paper continues the development of a discrete space-time concept that is
recently used in the explanation of the cosmological constant. Instead of order
estimation, a more theoretical treatment of the theory is introduced. Based on
the discrete space-time hypothesis, we find that the electroweak theory and
General Relativity can be combined into a single theory. An analytical form of
the cosmological constant can be found and the weakness problem of the
gravitational constant can also be explained.
