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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">cheb</journal-id><journal-title-group><journal-title xml:lang="ru">Чебышевский сборник</journal-title><trans-title-group xml:lang="en"><trans-title>Chebyshevskii Sbornik</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2226-8383</issn><publisher><publisher-name>Tula State Lev Tolstoy  Pedagogical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.22405/2226-8383-2016-17-1-117-129</article-id><article-id custom-type="elpub" pub-id-type="custom">cheb-9</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><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Article</subject></subj-group></article-categories><title-group><article-title>О ЦЕЛЫХ АЛГЕБРАИЧЕСКИХ ЧИСЛАХ И УНИТАРНЫХ МНОГОЧЛЕНАХ ВТОРОЙ СТЕПЕНИ</article-title><trans-title-group xml:lang="en"><trans-title>ON ALGEBRAIC INTEGERS AND MONIC POLYNOMIALS OF SECOND DEGREE</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>Коледа</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Koleda</surname><given-names>D. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>младший научный сотрудник, Институт математики Национальной академии наук Беларуси</p></bio><bio xml:lang="en"><p>junior researcher</p></bio><email xlink:type="simple">koledad@rambler.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт математики НАН Беларуси</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Mathematics of the National Academy of Sciences of Belarus</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2016</year></pub-date><pub-date pub-type="epub"><day>03</day><month>05</month><year>2016</year></pub-date><volume>17</volume><issue>1</issue><fpage>117</fpage><lpage>129</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Коледа Д.В., 2016</copyright-statement><copyright-year>2016</copyright-year><copyright-holder xml:lang="ru">Коледа Д.В.</copyright-holder><copyright-holder xml:lang="en">Koleda D.V.</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://www.chebsbornik.ru/jour/article/view/9">https://www.chebsbornik.ru/jour/article/view/9</self-uri><abstract><p>В статье рассматриваются алгебраические целые числа второй степени и приводимые квадратичные унитарные многочлены с целыми коэффициентами. Пусть Q &gt; 4 — целое число. Пусть Ωn(Q, S) — количество целых алгебраических чисел степени n и высоты 6 Q, принадлежащих множеству S ⊆ R. В работе уточнён остаточный член в асимптотической формуле для Ω2(Q, I), где I — произвольный отрезок. Обозначим через R(Q) множество приводимых унитарных многочленов второй степени с целыми коэффициентами и высотой 6 Q. Получена формула #R(Q) = 2 XQ k=1 τ (k) + 2Q + hp Q i − 1, где τ (k) — количество делителей числа k. Показано также, что количество вещественных целых алгебраических чисел второй степени и высоты 6 Q имеет асимптотику Ω2(Q,R) = 8Q2 − 16 3 Q p Q − 4QlnQ + 8(1 − γ)Q + O  p Q  , где γ — постоянная Эйлера. Известно, что функция плотности распределения алгебраических целых степени n равномерно стремится к плотности алгебраических чисел степени n−1. Мы показываем, что при n = 2 интеграл от их разности имеет ненулевой предел при стремлении высоты чисел к бесконечности.</p></abstract><trans-abstract xml:lang="en"><p>In this paper we consider the algebraic integers of second degree and reducible quadratic monic polynomials with integer coefficients. Let Q &gt; 4 be an integer. Define Ωn(Q, S) to be the number of algebraic integers of degree n and height 6 Q belonging to S ⊆ R. We improve the remainder term of the asymptotic formula for Ω2(Q, I), where I is an arbitrary interval.  Denote by R(Q) the set of reducible monic polynomials of second degree with integer coefficients and height 6 Q. We obtain the formula #R(Q) = 2 XQ k=1 τ (k) + 2Q + hp Q i − 1, where τ (k) is the number of divisors of k. Besides we show that the number of real algebraic integers of second degree and height 6 Q has the asymptotics Ω2(Q,R) = 8Q2 −16 3 Q p Q − 4QlnQ + 8(1 − γ)Q + O p Q  , where γ is the Euler constant. It is known that the density function of the distribution of algebraic integers of degree n uniformly tends to the density function of algebraic numbers of degree n−1. We show that for n = 2 the integral of their difference over the real line has nonzero limit as height of numbers tends to infinity.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>целые алгебраические числа</kwd><kwd>распределение алгебраических целых</kwd><kwd>квадратичные иррациональности</kwd><kwd>целочисленные унитарные многочлены</kwd></kwd-group><kwd-group xml:lang="en"><kwd>algebraic integers</kwd><kwd>distribution of algebraic integers</kwd><kwd>quadratic irrationalities</kwd><kwd>integral monic polynomials</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">Barroero F. Counting algebraic integers of fixed degree and bounded height // Monatshefte f¨ur Mathematik. 2014. Vol. 175, No. 1. 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