A probability space is a setS, together with a σ-algebraX on S and a measureP on that σ-algebra such that P(S) = 1.
The set S is called the sample space and the elements of X are called the events.
The measure P is called the probability measure, and P(E) is the probability of the event E.
... Edwin Peary, (1856-1920), first man to reach the North Pole
Auguste Piccard, (1884-1962), physicist and explorer
Jacques Piccard[?], (born 1922), undersea ...