Spectrum of the Jacobi Tau Approximation for the Second Derivative Operator. - Marios Charalambides; Fabian Waleffe (SIAM J. Numer. Anal., 2007)

Gegenbauer Tau Methods With and Without Spurious Eigenvalues. - Marios Charalambides; Fabian Waleffe (SIAM J. Numer. Anal., 2008)