Unitary eigensolver
Not yet written, will likely be based on Ming Gu’s unitary Divide and Conquer
algorithm for unitary Hessenberg matrices.
In the mean time, Schur() should be used.
Normal eigensolver
Not yet written, will likely be based on Angelika Bunse-Gerstner et al.’s
Jacobi-like method for simultaneous diagonalization of the commuting Hermitian
and skew-Hermitian portions of the matrix.
In the mean time, Schur() should be used.
