Definition:Matrix/Diagonal/Antidiagonal
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Definition
Let $\mathbf A = \sqbrk a_{m n}$ be a matrix.
An antidiagonal of $A$ is a diagonal of $\mathbf A$ lying perpendicular to the main diagonal of $\mathbf A$.
That is, a set of elements $\map a {r + k, s - k}$.
Also see
- Results about antidiagonals can be found here.
Sources
- 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): antidiagonal
- 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): matrix (plural matrices)