Note that all objects are really quantum mechanical in nature, that is they

traverse along paths with probabilities dictate by the action S of each path.

Now, comes the puzzling question of why is it that microscopic objects

travel along only one path?

Well, microscopic objects have comparably large masses and

have actions which are much larger compare to the quanta of action

which is given by the blanks constant.

Now therefore, microscopic objects posse only one dominant path

which determines their behavior and this part corresponds to the classical part

as determined by the principle of least action.

While such a formulation mostly merges into metonial mechanics for

macroscopic physical objects this has far reaching implications

on the interpretation of microscopic physical processes.

As discussed before the amplitude is related to the probability

of going from one to two.

Now, to find the probability of locating a particle at a location Q at a time T

we define the wave backed Sie which depends on the location Q and time T.

Now, this gives the time dependent probability distribution, P(q, t),

defined as the square of the wave bucket Psi (q, t).

Using the condition that probability must be Markovian, that is,

the system has no memory property, we can define the following equation.