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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">trudyniisi</journal-id><journal-title-group><journal-title xml:lang="ru">Труды НИИСИ</journal-title><trans-title-group xml:lang="en"><trans-title>SRISA Proceedings</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2225-7349</issn><issn pub-type="epub">3033-6422</issn><publisher><publisher-name>НИЦ «КУРЧАТОВСКИЙ ИНСТИТУТ» - НИИСИ</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">trudyniisi-39</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>МАТЕМАТИЧЕСКИЕ ИССЛЕДОВАНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MATHEMATICAL ISSUES</subject></subj-group></article-categories><title-group><article-title>О произведении множеств с единичной плотностью и его дополнении</article-title><trans-title-group xml:lang="en"><trans-title>On the Product of Sets with Density 1 and Its Addition</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>Штейников</surname><given-names>Ю. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Shteinikov</surname><given-names>Y. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Москва</p></bio><email xlink:type="simple">yuriisht@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">ФГУ ФНЦ НИИСИ РАН<country>Россия</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>15</day><month>10</month><year>2025</year></pub-date><volume>12</volume><issue>3</issue><fpage>62</fpage><lpage>64</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Штейников Ю.Н., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Штейников Ю.Н.</copyright-holder><copyright-holder xml:lang="en">Shteinikov Y.N.</copyright-holder><license 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://www.t-niisi.ru/jour/article/view/39">https://www.t-niisi.ru/jour/article/view/39</self-uri><abstract><p>В статье S.Bettin; D. Koukoulopoulos, С. Sanna «A note on the natural density of product sets», Bull. Lond. Math. Soc. 53, No. 5, 1407-1413, 2021 было доказано, что множество произведений двух произвольных множеств целых чисел с единичной плотностью снова является множеством с плотностью единица. В этой же статье также были приведены верхнице оценки для так называемых соответствующих дополняющих множеств при некоторых специальных ограничениях. В настоящей работе доказываются аналогичные оценки при более слабых ограничениях.</p></abstract><trans-abstract xml:lang="en"><p>Bettin, D. Koukoulopuos and C. Sanna proved in 2021 that the set of products of two arbitrary sets of integer with unit density is again a set with density of one. Article 3 of the authors also provides the top grades for the so-called corresponding complement sets under some special constraints. This article provides similar estimates for weaker restrictions.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>плотность</kwd><kwd>подмножества</kwd><kwd>произведение</kwd></kwd-group><kwd-group xml:lang="en"><kwd>density</kwd><kwd>subsets</kwd><kwd>product</kwd></kwd-group><funding-group xml:lang="ru"><funding-statement>Публикация выполнена в рамках государственного задания ФГУ ФНЦ НИИСИ РАН по теме № FNEF-2022-0011.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">S.Bettin; D. Koukoulopoulos, С. Sanna A note on the natural density of product sets. Bull. Lond. Math. Soc. 53, No. 5, 1407-1413 (2021).</mixed-citation><mixed-citation xml:lang="en">S.Bettin; D. Koukoulopoulos, С. Sanna A note on the natural density of product sets. Bull. Lond. Math. Soc. 53, No. 5, 1407-1413 (2021).</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>
