Definition:Pairwise Orthogonal/Columns

Definition
Let $\sqbrk a_{m n}$ be a matrix of order $m \times n$.

The columns of $\sqbrk a_{m n}$ are described as pairwise orthogonal :


 * $\forall i, j \in \set {1, 2, \ldots, n}, i \ne j: c_i \cdot c_j = 0$

That is, the dot product of each pair of distinct columns of $\sqbrk a_{m n}$, when considered as vectors, is zero.

Also see

 * Definition:Pairwise Orthogonal Rows