The Hilbert matrix on analytic tent spaces
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866914402705342464 |
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| author | Aguilar-Hernández, Tanausú Galanopoulos, Petros de la Rosa, Elena |
| author_facet | Aguilar-Hernández, Tanausú Galanopoulos, Petros de la Rosa, Elena |
| contents | We study for the first time the action of the Hilbert matrix $$\mathcal H=(c_{n,k})_{n,k\geq 0}, \quad c_{n,k}=\frac{1}{n+k+1}$$ on the analytic tent spaces $AT^q_p, 1<p,q <\infty,$ of the unit disc $\mathbb D$ of the complex plane. They were proposed by Triebel as the natural analytic version of the tent spaces of measurable functions defined by Coifman, Meyer and Stein. The $AT_p^q$ spaces are consisted of those analytic functions $f$ in $\mathbb D$ such that
$$
\|f\|_{AT_{p}^{q}}= \left\{\int_{\mathbb T} \left(\int_{Γ_{1/2}(ξ)} |f(z)|^p \ \frac{dA(z)}{1-|z|^2} \right)^{q/p}\ |dξ|\right \}^{1/q}<+\infty,
$$
where
$$
Γ_{1/2}(ξ) =\bigl\{ z\in \mathbb{D} : |z|< 1/2 \bigr\} \cup \bigcup_{|z|<1/2}[z,ξ),
$$ $dA(z)$ is the normalized area Lebesgue measure in $\mathbb D$ and $|dξ|$ is the arc length in the unit circle $\mathbb T$. The Bergman spaces $A^p, p>1,$ stand among the $AT_{p}^{q}$ and correspond to the case $p=q$. The multiplication of the Hilbert matrix with the column matrix with entries the Taylor coefficients of an $f(z)=\sum_{k\geq 0} a_k z^k $ analytic in $\mathbb D$ introduces the series $$
\mathcal H (f)(z)=
\sum_{n=0}^{\infty}\left(\sum_{k=0}^{\infty}
\frac{a_k}{n+k+1}\right)z^n\,, \quad z\in \mathbb D\,\, $$ known in the literature as Hilbert operator. We prove that it is a bounded operator on the $AT_{p}^{q}$ when $1/p + 1/q <1,\, p>2$. This is a natural range for the values of the indices $p,q$ compared to what is known in the special case of the Bergman spaces. We confront the question under discussion through a more general point of view by studying an associated integral operator defined with respect to a positive Borel measure $μ$ on $[0,1)$. Finally, we provide an estimation of the norm of the Hilbert operator. Our work extends in a non-trivially way previous results on the Bergman spaces to the analytic tent spaces. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_16826 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | The Hilbert matrix on analytic tent spaces Aguilar-Hernández, Tanausú Galanopoulos, Petros de la Rosa, Elena Complex Variables Functional Analysis Primary 47B35, Secondary 30H, 30H10, 30H20, 46E15 We study for the first time the action of the Hilbert matrix $$\mathcal H=(c_{n,k})_{n,k\geq 0}, \quad c_{n,k}=\frac{1}{n+k+1}$$ on the analytic tent spaces $AT^q_p, 1<p,q <\infty,$ of the unit disc $\mathbb D$ of the complex plane. They were proposed by Triebel as the natural analytic version of the tent spaces of measurable functions defined by Coifman, Meyer and Stein. The $AT_p^q$ spaces are consisted of those analytic functions $f$ in $\mathbb D$ such that $$ \|f\|_{AT_{p}^{q}}= \left\{\int_{\mathbb T} \left(\int_{Γ_{1/2}(ξ)} |f(z)|^p \ \frac{dA(z)}{1-|z|^2} \right)^{q/p}\ |dξ|\right \}^{1/q}<+\infty, $$ where $$ Γ_{1/2}(ξ) =\bigl\{ z\in \mathbb{D} : |z|< 1/2 \bigr\} \cup \bigcup_{|z|<1/2}[z,ξ), $$ $dA(z)$ is the normalized area Lebesgue measure in $\mathbb D$ and $|dξ|$ is the arc length in the unit circle $\mathbb T$. The Bergman spaces $A^p, p>1,$ stand among the $AT_{p}^{q}$ and correspond to the case $p=q$. The multiplication of the Hilbert matrix with the column matrix with entries the Taylor coefficients of an $f(z)=\sum_{k\geq 0} a_k z^k $ analytic in $\mathbb D$ introduces the series $$ \mathcal H (f)(z)= \sum_{n=0}^{\infty}\left(\sum_{k=0}^{\infty} \frac{a_k}{n+k+1}\right)z^n\,, \quad z\in \mathbb D\,\, $$ known in the literature as Hilbert operator. We prove that it is a bounded operator on the $AT_{p}^{q}$ when $1/p + 1/q <1,\, p>2$. This is a natural range for the values of the indices $p,q$ compared to what is known in the special case of the Bergman spaces. We confront the question under discussion through a more general point of view by studying an associated integral operator defined with respect to a positive Borel measure $μ$ on $[0,1)$. Finally, we provide an estimation of the norm of the Hilbert operator. Our work extends in a non-trivially way previous results on the Bergman spaces to the analytic tent spaces. |
| title | The Hilbert matrix on analytic tent spaces |
| topic | Complex Variables Functional Analysis Primary 47B35, Secondary 30H, 30H10, 30H20, 46E15 |
| url | https://arxiv.org/abs/2603.16826 |