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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">dan</journal-id><journal-title-group><journal-title xml:lang="ru">Доклады Национальной академии наук Беларуси</journal-title><trans-title-group xml:lang="en"><trans-title>Doklady of the National Academy of Sciences of Belarus</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-8323</issn><issn pub-type="epub">2524-2431</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1561-8323-2022-66-2-135-140</article-id><article-id custom-type="elpub" pub-id-type="custom">dan-1047</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>МАТЕМАТИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MATHEMATICS</subject></subj-group></article-categories><title-group><article-title>Основная теорема финансовой математики: усиленная версия и область поиска мартингальных мер</article-title><trans-title-group xml:lang="en"><trans-title>Fundamental theorem of asset pricing: a strengthened version and а martingale measures search area</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>Лебедев</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Lebedev</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лебедев Андрей Владимирович – доктор физико-математических наук, профессор, заведующий кафедрой</p><p>пр. Независимости, 4, 220050, Минск</p></bio><bio xml:lang="en"><p>Lebedev Andrei V. – D. Sc. (Physics and Mathematics), Professor, Head of the Department</p><p>4, Nezavisimosti Ave., 220050, Minsk</p></bio><email xlink:type="simple">lebedev@bsu.by</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ромащенко</surname><given-names>Г. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Romashchenko</surname><given-names>G. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ромащенко Галина Станиславовна – кандидат физико-математических наук, доцент</p><p>пр. Независимости, 4, 220050, Минск</p></bio><bio xml:lang="en"><p>Romashchenko Galina S. – Ph. D. (Physics and Mathematics), Associate Professor</p><p>4, Nezavisimosti Ave., 220050, Minsk</p></bio><email xlink:type="simple">gal.romash@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Забрейко</surname><given-names>П. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Zabreiko</surname><given-names>P. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Белорусский государственный университет</institution></aff><aff xml:lang="en"><institution>Belarusian State University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>05</day><month>05</month><year>2022</year></pub-date><volume>66</volume><issue>2</issue><fpage>135</fpage><lpage>140</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Лебедев А.В., Ромащенко Г.С., Забрейко П.П., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Лебедев А.В., Ромащенко Г.С., Забрейко П.П.</copyright-holder><copyright-holder xml:lang="en">Lebedev A.V., Romashchenko G.S., Zabreiko P.P.</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://doklady.belnauka.by/jour/article/view/1047">https://doklady.belnauka.by/jour/article/view/1047</self-uri><abstract><p>Представлена усиленная геометрическая версия «основной теоремы финансовой математики» для одношаговой модели финансовых рынков. Вскрыта принципиальная роль тотальных и неаннулирующих конусов, в терминах которых описываются условия существования мартингальных мер. На этой базе доказана «основная теорема финансовой математики» для p-суммируемых рынков.</p><p> </p></abstract><trans-abstract xml:lang="en"><p>In the article a strengthened version of the ’Fundamental Theorem of Asset Pricing’ for a one-period market model is proven. The principal role in this result is played by total and nonanihilating cones.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>арбитраж</kwd><kwd>мартингальная мера</kwd><kwd>оштукатуриваемый конус</kwd><kwd>тотальный конус</kwd><kwd>неаннулирующий конус</kwd></kwd-group><kwd-group xml:lang="en"><kwd>arbitrage</kwd><kwd>martingale measure</kwd><kwd>plastered cone</kwd><kwd>total cone</kwd><kwd>non-annulment cone</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">Delbaen, F. 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