Definition
A set of two or more vectors in a real inner product space is said to be orthogonal, if all pairs of distinct vectors in the set are orthogonal.
An orthogonal set in which each vector has norm 1 is said to be orthonormal.
A set of two or more vectors in a real inner product space is said to be orthogonal, if all pairs of distinct vectors in the set are orthogonal.
An orthogonal set in which each vector has norm 1 is said to be orthonormal.