Square summability with geometric weight for classical orthogonal expansions
Square summability with geometric weight for classical orthogonal expansions
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经典正交展开的具有几何权重的平方可和性
DOI:
10.1142/9789812701732_0037
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发表时间:
2005
期刊:
影响因子:
--
通讯作者:
D. Karp
中科院分区:
文献类型:
--
作者:
D. Karp
Let $f_k$ be the $k$-th Fourier coefficient of a function $f$ in terms of the orthonormal Hermite, Laguerre or Jacobi polynomials. We give necessary and sufficient conditions on $f$ for the inequality $\sum_{k}|f_k|^2\theta^k 1$. As a by-product new orthogonality relations for the Hermite and Laguerre polynomials are found. The basic machinery for the proofs is provided by the theory of reproducing kernel Hilbert spaces.