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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">izvuzmath</journal-id><journal-title-group><journal-title xml:lang="ru">Известия высших учебных заведений. Математика</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestiya Vysshikh Uchebnykh Zavedenii. Matematika</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0021-3446</issn><issn pub-type="epub">2076-4626</issn><publisher><publisher-name>Казанский (Приволжский) федеральный университет</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26907/0021-3446-2026-3-3-11</article-id><article-id custom-type="elpub" pub-id-type="custom">izvuzmath-272</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Статьи</subject></subj-group></article-categories><title-group><article-title>Взвешенные неравенства для разностей средних над лакунарными последовательностями в пространствах LP</article-title><trans-title-group xml:lang="en"><trans-title>Weighted inequalities for the differences of averages over lacunary sequences on Lp spaces</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Демир</surname><given-names>С.</given-names></name><name name-style="western" xml:lang="en"><surname>Demir</surname><given-names>S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сакин Демир</p><p>Агры, 04100</p></bio><bio xml:lang="en"><p>Sakin Demir</p><p>A˘grı, 04100 </p></bio><email xlink:type="simple">sakin.demir@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Университет Агры Ибрагима Чечена</institution><country>Турция</country></aff><aff xml:lang="en"><institution>Agri Ibrahim Cecen University</institution><country>Turkey</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>12</day><month>04</month><year>2026</year></pub-date><volume>0</volume><issue>3</issue><fpage>3</fpage><lpage>11</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Демир С., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Демир С.</copyright-holder><copyright-holder xml:lang="en">Demir S.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://izvuzmath.elpub.ru/jour/article/view/272">https://izvuzmath.elpub.ru/jour/article/view/272</self-uri><abstract><p>Пусть $f$ — измеримая функция, заданная на $\mathbb{R}$, определим оператор $$\mathcal{G}(\phi_n\ast f)(x)=\sup_N\left|\sum_{k=0}^Nc_k(\phi_{n_{k+1}}\ast f(x)-\phi_{n_k}\ast f(x))\right|,$$ где $\phi_n(x)=\dfrac{1}{n}\chi_{[0,n]}(x)$, а $\ast$ обозначает свертку. Пусть $1&lt;r&lt;\infty$ и $r^\prime =\dfrac{r}{r-1}$. Тогда для всех $1&lt;\rho &lt;\infty$ и для всех $(f_j)\in L^p(w)\cap L^p(\mathbb{R})$ взвешенные неравенства $$\left\|\Bigg(\sum_j(\mathcal{G}(\phi_n\ast f_j)^{\rho}\Bigg)^{1/\rho}\right\|_{L^p(w)}\leq C_{p,\rho}(w)\left\|\Bigg(\sum_j|f_j|^{\rho}\Bigg)^{1/{\rho}}\right\|_{L^p(w)}$$ выполняются, если $w\in A_{p/r^\prime}$ и $r^\prime\leq p&lt;\infty$ или если $w\in A_p^{r^\prime}$ и $1&lt;p\leq r^\prime$. Аналогично, если $w(x)^{r^\prime}\in A_1$, то неравенство слабого типа \begin{align*} w\left(\left\{x:\Bigg(\sum_j(\mathcal{G}(\phi_n\ast f_j)(x))^{\rho}\Bigg)^{1/\rho}&gt;\lambda\right\}\right)  \leq C_{\rho}(w)\frac{1}{\lambda}\int\Bigg(\sum_j|f_j(x)|^{\rho}\Bigg)^{1/\rho}w(x)\, dx \end{align*} выполняется для всех $(f_j)\in L^1(w)\cap L^1(\mathbb{R})$.\\ \indent В частности, взвешенное неравенство $$\left\|\mathcal{G}(\phi_n\ast f)\right\|_{L^p(w)}\leq C_{p,\rho}(w)\left\|f \right\|_{L^p(w)}$$ выполняется для всех $f\in L^p(w)\cap L^p(\mathbb{R}^n)$, если $w\in A_{p/r^\prime}$ и $r^\prime\leq p&lt;\infty$ или если $w\in A_p^{r^\prime}$ и $1&lt;p\leq r^\prime$. Аналогично, если $w(x)^{r^\prime}\in A_1$, то неравенство слабого типа \begin{align*} w\big(\{x:\mathcal{G}(\phi_n\ast f)(x)&gt;\lambda\}\big)\leq C_{\rho}(w)\frac{1}{\lambda}\int |f(x)| w(x)\, dx \end{align*} выполняется для всех $f\in L^1(w)\cap L^1(\mathbb{R})$.</p></abstract><trans-abstract xml:lang="en"><p>Let $f$ be a measurable function defined on $\mathbb{R}$,   define the operator $$\mathcal{G}(\phi_n\ast f)(x)=\sup_N\left|\sum_{k=0}^Nc_k(\phi_{n_{k+1}}\ast f(x)-\phi_{n_k}\ast f(x))\right|,$$ where $\phi_n(x)=\dfrac{1}{n}\chi_{[0,n]}(x)$, and $\ast$ stands for convolution. Let $1&lt;r&lt;\infty$ and $r^\prime =\dfrac{r}{r-1}$. Then for all $1&lt;\rho &lt;\infty$, and for all $(f_j)\in L^p(w)\cap L^p(\mathbb{R})$, the weighted inequalities $$\left\|\Bigg(\sum_j(\mathcal{G}(\phi_n\ast f_j)^{\rho}\Bigg)^{1/\rho}\right\|_{L^p(w)}\leq C_{p,\rho}(w)\left\|\Bigg(\sum_j|f_j|^{\rho}\Bigg)^{1/{\rho}}\right\|_{L^p(w)}$$ hold if $w\in A_{p/r^\prime}$ and $r^\prime\leq p&lt;\infty$, or if $w\in A_p^{r^\prime}$ and $1&lt;p\leq r^\prime$. Likewise, if $w(x)^{r^\prime}\in A_1$, then the weak type inequality \begin{align*} w\left(\left\{x:\Bigg(\sum_j(\mathcal{G}(\phi_n\ast f_j)(x))^{\rho}\Bigg)^{1/\rho}&gt;\lambda\right\}\right)  \leq C_{\rho}(w)\frac{1}{\lambda}\int\Bigg(\sum_j|f_j(x)|^{\rho}\Bigg)^{1/\rho}w(x)\, dx \end{align*} holds for all $(f_j)\in L^1(w)\cap L^1(\mathbb{R})$.\\ \indent In particular, the weighted inequality $$\left\|\mathcal{G}(\phi_n\ast f)\right\|_{L^p(w)}\leq C_{p,\rho}(w)\left\|f \right\|_{L^p(w)}$$ holds for all $f\in L^p(w)\cap L^p(\mathbb{R}^n)$ if $w\in A_{p/r^\prime}$ and $r^\prime\leq p&lt;\infty$, or if $w\in A_p^{r^\prime}$ and $1&lt;p\leq r^\prime$. Likewise, if $w(x)^{r^\prime}\in A_1$, then the weak type inequality \begin{align*} w\big(\{x:\mathcal{G}(\phi_n\ast f)(x)&gt;\lambda\}\big)\leq C_{\rho}(w)\frac{1}{\lambda}\int |f(x)| w(x)\, dx \end{align*} holds  for all $f\in L^1(w)\cap L^1(\mathbb{R})$.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>последовательность разностей</kwd><kwd>векторное неравенство</kwd><kwd>взвешенное неравенство</kwd><kwd>лакунарная последовательность</kwd></kwd-group><kwd-group xml:lang="en"><kwd>difference sequence</kwd><kwd>vector-valued inequality</kwd><kwd>weighted inequality</kwd><kwd>lacunary sequence</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Demir S. Inequalities for the variation operator, Bull. Hell. Math. Soc. 64, 92–97 (2020).</mixed-citation><mixed-citation xml:lang="en">Demir S. Inequalities for the variation operator, Bull. Hell. Math. Soc. 64, 92–97 (2020).</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Demir S. Variational inequalities for the differences of averages over lacunary sequences, New York J. Math. 28, 1099–1111 (2022).</mixed-citation><mixed-citation xml:lang="en">Demir S. Variational inequalities for the differences of averages over lacunary sequences, New York J. Math. 28, 1099–1111 (2022).</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Демир С. Вариационные неравенства и неравенства lambda -скачка в Hp -пространствах, Изв. вузов. Матем. (4), 15–19 (2024).</mixed-citation><mixed-citation xml:lang="en">Демир С. Вариационные неравенства и неравенства lambda -скачка в Hp -пространствах, Изв. вузов. Матем. (4), 15–19 (2024).</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Jones R. L., Rosenblatt J. Differential and ergodic transforms, Math. Ann. 323, 525–546 (2002).</mixed-citation><mixed-citation xml:lang="en">Jones R. L., Rosenblatt J. Differential and ergodic transforms, Math. Ann. 323, 525–546 (2002).</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Rubio de Francia J.L., Ruiz F. J., Torrea J.L. Weighted norm inequalities for the Hardy maximal function, Trans. AMS 165, 207–226 (1972).</mixed-citation><mixed-citation xml:lang="en">Rubio de Francia J.L., Ruiz F. J., Torrea J.L. Weighted norm inequalities for the Hardy maximal function, Trans. AMS 165, 207–226 (1972).</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
