Geodesic
The Bergman kernel: Explicit formulas, deflation, Lu Qi-Keng problem and Jacobi polynomials
Czechoslovak Mathematical Journal, Tome 67 (2017) no. 2, pp. 537-549 Cet article a éte moissonné depuis la source Czech Digital Mathematics Library

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We investigate the Bergman kernel function for the intersection of two complex ellipsoids $\{(z,w_1,w_2) \in \mathbb {C}^{n+2} \colon |z_1|^2 + \cdots + |z_n|^2 + |w_1|^q 1, \ |z_1|^2 + \cdots + |z_n|^2 + |w_2|^r 1\}. $ We also compute the kernel function for $\{(z_1,w_1,w_2) \in \mathbb {C}^3 \colon |z_1|^{2/n} + |w_1|^q 1, \ |z_1|^{2/n} + |w_2|^r 1\}$ and show deflation type identity between these two domains. Moreover in the case that $q=r=2$ we express the Bergman kernel in terms of the Jacobi polynomials. The explicit formulas of the Bergman kernel function for these domains enables us to investigate whether the Bergman kernel has zeros or not. This kind of problem is called a Lu Qi-Keng problem.
We investigate the Bergman kernel function for the intersection of two complex ellipsoids $\{(z,w_1,w_2) \in \mathbb {C}^{n+2} \colon |z_1|^2 + \cdots + |z_n|^2 + |w_1|^q 1, \ |z_1|^2 + \cdots + |z_n|^2 + |w_2|^r 1\}. $ We also compute the kernel function for $\{(z_1,w_1,w_2) \in \mathbb {C}^3 \colon |z_1|^{2/n} + |w_1|^q 1, \ |z_1|^{2/n} + |w_2|^r 1\}$ and show deflation type identity between these two domains. Moreover in the case that $q=r=2$ we express the Bergman kernel in terms of the Jacobi polynomials. The explicit formulas of the Bergman kernel function for these domains enables us to investigate whether the Bergman kernel has zeros or not. This kind of problem is called a Lu Qi-Keng problem.
DOI : 10.21136/CMJ.2017.0073-16
Classification : 32A25, 33D70
Keywords: Lu Qi-Keng problem; Bergman kernel; Routh-Hurwitz theorem; Jacobi polynomial 
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     author = {Beberok, Tomasz},
     title = {The {Bergman} kernel: {Explicit} formulas, deflation, {Lu} {Qi-Keng} problem and {Jacobi} polynomials},
     journal = {Czechoslovak Mathematical Journal},
     pages = {537--549},
     year = {2017},
     volume = {67},
     number = {2},
     doi = {10.21136/CMJ.2017.0073-16},
     mrnumber = {3661059},
     zbl = {06738537},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.2017.0073-16/}
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Beberok, Tomasz. The Bergman kernel: Explicit formulas, deflation, Lu Qi-Keng problem and Jacobi polynomials. Czechoslovak Mathematical Journal, Tome 67 (2017) no. 2, pp. 537-549. doi: 10.21136/CMJ.2017.0073-16

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