A square matrix is called bisymmetric if it is both centrosymmetric and either symmetric or antisymmetric (Muir 1960, p. 19).
Bisymmetric Matrix
See also
Antisymmetric Matrix, Centrosymmetric Matrix, Symmetric MatrixExplore with Wolfram|Alpha
References
Muir, T. A Treatise on the Theory of Determinants. New York: Dover, 1960.Referenced on Wolfram|Alpha
Bisymmetric MatrixCite this as:
Weisstein, Eric W. "Bisymmetric Matrix." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/BisymmetricMatrix.html