# Jointly orthogonal polynomials

@article{Felder2015JointlyOP, title={Jointly orthogonal polynomials}, author={G. Felder and T. Willwacher}, journal={J. Lond. Math. Soc.}, year={2015}, volume={91}, pages={750-768} }

The theory of polynomials orthogonal with respect to one inner product is classical. We discuss the extension of this theory to multiple inner products. Examples include the Lame and Heine-Stieltjes polynomials. As a consequence, we give a new characterization of these classical families of polynomials by their orthogonality properties, without reference to differential equations.

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