ZHANG, Ruda June 20, 2022:  Corrections to Grassmann manifold. More on real versions: Hermitian vs. symmetric; unitary vs. orthogonal. Commutability and simultaneous diagonability. Real representations of unitary, complex orthogonal matrices. [f9ec122]
ZHANG, Ruda June 15, 2022:  Format spectral analysis. [d98a70c]
ZHANG, Ruda December 30, 2018:  Use dollar style math markup. [1b7036c]
Ruda Zhang October 10, 2016:  Colors of noise. [b9b2293]
Ruda Zhang September 06, 2016:  Spectral density estimation. [80d45c3]