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.
- ordered field
- ordered pair
- order isomorphism
- order notation
- order of contact
- order of convergence
- order of magnitude
- order statistics
- ordinal data
- ordinal number
- ordinal scale
- ordinary differential equation
- ordinate
- orientable
- orientation
- origin
- orthocentre
- orthogonal
- orthogonal complement
- orthogonal curves
- orthogonal matrix
- orthogonal polynomials
- orthogonal projection
- orthogonal set
- orthonormal