Persymmetric
Persymmetric matrix
Square matrix symmetric about its anti-diagonal
In mathematics, persymmetric matrix may refer to:
- a square matrix which is symmetric with respect to the northeast-to-southwest diagonal (anti-diagonal); or
- a square matrix such that the values on each line perpendicular to the main diagonal are the same for a given line.
The first definition is the most common in the recent literature. The designation "Hankel matrix" is often used for matrices satisfying the property in the second definition.