semi-positive real symmetric matrix
real skew-symmetric matrix
real symmetric banded matrix
real symmetric five-diagonal matrix
Real Symmetric Tri-diagonal Matrix
Real tridiagonal symmetric matrix
0-1 symmetric matrix of positive line
anti-bidiagonal symmetric matrix
anti-centro-symmetric matrix
anti-symmetric and orth-anti-symmetric matrix
anti-symmetric orthogonal anti-symmetric matrix
Anti-symmetric ortho-symmetric matrix
centroskew symmetric matrix
centro-symmetric matrix
complex symmetric matrix
D auti-symmetric matrix
Diagonalizaton of a symmetric matrix