Biorthogonal polynomials are constructed via LU factorization of Gram matrices, recovering Hankel-case properties, classical orthogonal polynomials, and Christoffel-Geronimus perturbation formulas.
Simon The Christoffel–Darboux kernel , Perspectives in Partial Differential Equations, Harmonic Analysis and Applications: A V olume in Honor of Vladimir G
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Revisiting Biorthogonal Polynomials. An $LU$ factorization discussion
Biorthogonal polynomials are constructed via LU factorization of Gram matrices, recovering Hankel-case properties, classical orthogonal polynomials, and Christoffel-Geronimus perturbation formulas.