The idea of studying randomness seems like a contradiction in terms. After all, randomness is chaotic, the very antithesis of the lawlike behavior that something must exhibit to make it amenable to any sort of explanation at all.

To clearly explain what a Wiener process is, it is first necessary to go back to basics and explain a few simpler concepts and how they are used mathematically.

However carefully some of the pure mathematics underlying Wiener processes may have been explained, though, it’s probably the case that the whole matter still appears rather arid and abstract.