Geodesic
On differential operators for Chebyshev polynomials of several variables
Zapiski Nauchnykh Seminarov POMI, Questions of quantum field theory and statistical physics. Part 25, Tome 473 (2018), pp. 99-109 
E. V. Damaskinskiy; M. A. Sokolov. On differential operators for Chebyshev polynomials of several variables. Zapiski Nauchnykh Seminarov POMI, Questions of quantum field theory and statistical physics. Part 25, Tome 473 (2018), pp. 99-109. http://geodesic.mathdoc.fr/item/ZNSL_2018_473_a6/
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     author = {E. V. Damaskinskiy and M. A. Sokolov},
     title = {On differential operators for {Chebyshev} polynomials of several variables},
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     url = {http://geodesic.mathdoc.fr/item/ZNSL_2018_473_a6/}
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Voir la notice du chapitre de livre provenant de la source Math-Net.Ru

We obtain the differential operators for bivariate Chebyshev polynomials of the first kind, associated with root systems of the simple Lie algebras $C_2$ and $G_2$.

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