2

The number two (2) is the second Positive Integer and the first Prime Number. It is Even, andis the only Even Prime (the Primes other than 2 are called the Odd Primes). Thenumber 2 is also equal to its Factorial since . A quantity taken to the Power 2 is said tobe Squared. The number of times a given Binary number is divisible by 2is given by the position of the first , counting from the right. For example, is divisible by 2twice, and is divisible by 2 zero times.

• Chebyshev Polynomial of the First Kind
• Chebyshev Polynomial of the Second Kind
• Chebyshev Quadrature
• Chebyshev-Radau Quadrature
• Chebyshev's Theorem
• Chebyshev Sum Inequality
• Chebyshev-Sylvester Constant
• Checkerboard
• Checker-Jumping Problem
• Checkers
• Checksum
• Cheeger's Finiteness Theorem
• Chefalo Knot
• Chen's Theorem
• Chern Class
• Chern Number
• Chernoff Face
• Chess
• Chessboard
• Chevalley Groups
• Chevalley's Theorem
• Chevron
• Chi
• Chi Distribution
• Chi Inequality