The q-Heun operator of big q-Jacobi type and the q-Heun algebra

The q-Heun operator of big q-Jacobi type and the q-Heun algebra
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大q-Jacobi型q-Heun算子和q-Heun代数

DOI:
10.1007/s11139-018-0106-8
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发表时间:
2018-08
期刊:
影响因子:
0.7
通讯作者:
Zhedanov Alexei
Zhedanov Alexei
中科院分区:
数学3区
文献类型:
--
作者:
Baseilhac Pascal;Vinet Luc;Zhedanov Alexei

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The q-Heun operator of the big q-Jacobi type on the exponential grid is defined. This operator is the most general second-order q-difference operator that maps polynomials of degreento polynomials of degree. It is tridiagonal in bases made out of either q-Pochhammer or big q-Jacobi polynomials and is bilinear in the operators of the q-Hahn algebra. The extension of this algebra that includes the q-Heun operator as generator is described. Biorthogonal Pastro polynomials are shown to satisfy a generalized eigenvalue problem or equivalently to be in the kernel of a special linear pencil made out of two q-Heun operators. The special case of the q-Heun operator associated to the little q-Jacobi polynomials is also treated.
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