Cards
Cards are a set of 
rectangular pieces of cardboard with markings on one side and a uniform pattern on the other. Thecollection of all cards is called a ``deck,'' and a normal deck of cards consists of 52 cards of four different ``suits.''The suits are called clubs (
), diamonds (
), hearts (
), and spades (
). Spades and clubs are colored black, while hearts and diamonds are colored red. Thecards of each suit are numbered 1 through 13, where the special terms ace (1), jack (11), queen (12), and king (13) areused instead of numbers 1 and 11-13.
The randomization of the order of cards in a deck is called Shuffling. Cards are used in many gamblinggames (such as Poker), and the investigation of the probabilities of various outcomes in card games was one of the originalmotivations for the development of modern Probability theory.
See also Bridge Card Game, Clock Solitaire, Coin, Coin Tossing, Dice, Poker,Shuffle- Heilbronn Triangle Problem
- Heine-Borel Theorem
- Heine Hypergeometric Series
- Heisenberg Group
- Heisenberg Space
- Held Group
- Helen of Geometers
- Helicoid
- Helix
- Helly Number
- Helly's Theorem
- Helmholtz Differential Equation
- Helmholtz Differential Equation--Bipolar Coordinates
- Helmholtz Differential Equation--Cartesian Coordinates
- Helmholtz Differential Equation--Circular Cylindrical Coordinates
- Helmholtz Differential Equation--Confocal Ellipsoidal Coordinates
- Helmholtz Differential Equation--Confocal Paraboloidal Coordinates
- Helmholtz Differential Equation--Conical Coordinates
- Helmholtz Differential Equation--Elliptic Cylindrical Coordinates
- Helmholtz Differential Equation--Oblate Spheroidal Coordinates
- Helmholtz Differential Equation--Parabolic Coordinates
- Helmholtz Differential Equation--Parabolic Cylindrical Coordinates
- Helmholtz Differential Equation Polar Coordinates
- Helmholtz Differential Equation--Prolate Spheroidal Coordinates
- Helmholtz Differential Equation--Spherical Coordinates