selection

(See also binomial coefficient.) For example, from four objects A, B, C, and D, there are six ways of selecting two: AB, AC, AD, BC, BD, CD. The property that

can be directly seen in Pascal's triangle. Compare permutation.

• colourable
• column equivalence
• column operation
• column rank
• column space
• column vector
• combination
• combinatorial analysis
• combinatorial logic
• combinatorial topology
• commensurable
• common denominator
• common difference
• common factor
• common fraction
• common logarithm
• common multiple
• common perpendicular
• common ratio
• common tangent
• communicating class
• commutative
• commutative algebra
• commutative diagram
• commutative ring