The latin letter p.
The Latin Alphabet is a collection of 26 symbols that form the basis of the English language. The alphabet's symbols are used throughout mathematics to represent variables, constants, and coeffecients.
The capital Latin letter P is used throughout mathematics as a variable. The symbol is used to represent a point in space in the Cartesian Coordinate System. The symbol is used in various formulas and in statistics the symbol is used to represent a probability distribution.