<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "JATS-journalpublishing1-3.dtd">
<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">matmess</journal-id><journal-title-group><journal-title xml:lang="ru">Математические заметки СВФУ</journal-title><trans-title-group xml:lang="en"><trans-title>Mathematical notes of NEFU</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2411-9326</issn><issn pub-type="epub">2587-876X</issn><publisher><publisher-name>Северо-Восточный федеральный университет имени М.К. Аммосова</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">matmess-378</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></article-categories><title-group><article-title>СИММЕТРИЙНЫЙ АНАЛИЗ И ТОЧНЫЕ РЕШЕНИЯ ОДНОЙ НЕЛИНЕЙНОЙ МОДЕЛИ ТЕОРИИ ФИНАНСОВЫХ РЫНКОВ</article-title><trans-title-group xml:lang="en"><trans-title>SYMMETRY ANALYSIS AND EXACT SOLUTIONS FOR A NONLINEAR MODEL OF THE FINANCIAL MARKETS THEORY</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>Дышаев</surname><given-names>М. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Dyshaev</surname><given-names>M. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Дышаев Михаил Михайлович</p><p>Челябинский гос. университет, ул. Бр. Кашириных, 129, Челябинск 454001</p></bio><bio xml:lang="en"><p>Dyshaev Mikhail Mikhayilovich</p><p>Cheliabinsk State University, Br. Kashirinykh st., 129, Cheliabinsk 454001, Russia</p></bio><email xlink:type="simple">Mikhail.Dyshaev@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>Федоров</surname><given-names>В. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Fedorov</surname><given-names>V. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Федоров Владимир Евгеньевич</p><p>Челябинский гос. университет, ул. Бр. Кашириных, 129, Челябинск 454001</p></bio><bio xml:lang="en"><p>Fedorov Vladimir Evgenevich</p><p>Cheliabinsk State University, Br. Kashirinykh st., 129, Cheliabinsk 454001, Russia</p></bio><email xlink:type="simple">kar@csu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Челябинский гос. университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Cheliabinsk State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2016</year></pub-date><pub-date pub-type="epub"><day>23</day><month>06</month><year>2026</year></pub-date><volume>23</volume><issue>1</issue><fpage>28</fpage><lpage>45</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Дышаев М.М., Федоров В.Е., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Дышаев М.М., Федоров В.Е.</copyright-holder><copyright-holder xml:lang="en">Dyshaev M.M., Fedorov V.E.</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://matmess.elpub.ru/jour/article/view/378">https://matmess.elpub.ru/jour/article/view/378</self-uri><abstract><p>Проведена групповая классификация семейства уравнений Сиркара — Папаниколау со свободным параметром, включающего в себя в простейшем случае уравнение Блэка — Шоулса. С помощью найденной пятимерной группы преобразований эквивалентности такого уравнения осуществлен поиск трехмерного ядра основных алгебр Ли и четырехмерных основных алгебр Ли уравнения в случае двух спецификаций свободного элемента. Для каждой из алгебр найдены оптимальные системы подалгебр и соответствующие этим подалгебрам инвариантные решения или инвариантные подмодели уравнения. Вычисленные инвариантные решения включены в более общие многопараметрические семейства решений, инвариантные относительно всей основной алгебры Ли.</p></abstract><trans-abstract xml:lang="en"><p>Group classification is obtained for the Sircar–Papanicolaou equations family with a free parameter that contains the Black–Scholes equation as the simplest partial case. The five-dimensional group of equivalence transformations is calculated and threedimensional kernel of principal Lie algebras and four-dimensional principal Lie algebras in cases of two free element specifications are found. Optimal subalgebras systems and corresponding invariant solutions or invariant submodels are calculated for every Lie algebra. Invariant solutions are included in more general multiparameter solutions families that are invariant with respect to the whole Lie algebra.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>нелинейное уравнение в частных производных</kwd><kwd>уравнение Блэка — Шоулса</kwd><kwd>модель Сиркара — Папаниколау</kwd><kwd>ценообразование опционов</kwd><kwd>групповой анализ</kwd><kwd>инвариантное решение</kwd><kwd>инвариантная подмодель</kwd><kwd>динамическое хеджирование</kwd><kwd>эффекты обратной связи при хеджировании</kwd></kwd-group><kwd-group xml:lang="en"><kwd>nonlinear partial differential equation</kwd><kwd>Black–Scholes equation</kwd><kwd>Sircar– Papanicolaou model</kwd><kwd>pricing options</kwd><kwd>group analysis</kwd><kwd>invariant solution</kwd><kwd>invariant submodel</kwd><kwd>dynamic hedging</kwd><kwd>feedback effects of hedging</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена частично при финансовой поддержке Лаборатории квантовой топологии Челябинского гос. университета (грант правительства РФ №14.Z50.31.0020).</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">Black F., Scholes M. The pricing of options and corporate liabilities // J. Political Econ 1973. V. 81. P. 637–659.</mixed-citation><mixed-citation xml:lang="en">Black F., Scholes M. The pricing of options and corporate liabilities // J. Political Econ 1973. V. 81. P. 637–659.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Derman E., Taleb N. The illusions of dynamic replication // Quant. Finance. 2005. V. 5, N 4. P. 323–326.</mixed-citation><mixed-citation xml:lang="en">Derman E., Taleb N. The illusions of dynamic replication // Quant. Finance. 2005. V. 5, N 4. P. 323–326.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Haug E. G., Taleb N. N. Option traders use (very) sophisticated heuristics, never the Black– Scholes–Merton formula // J. Econ. Behavior Organization. 2011. V. 77, N 2. P. 97–106. 4. Sircar K. R., Papanicolaou G. General Black–Scholes models accounting for increased market volatility from hedging strategies // Appl. Math. Finance. 1998. V. 5. P. 45–82.</mixed-citation><mixed-citation xml:lang="en">Haug E. G., Taleb N. N. Option traders use (very) sophisticated heuristics, never the Black– Scholes–Merton formula // J. Econ. Behavior Organization. 2011. V. 77, N 2. P. 97–106. 4. Sircar K. R., Papanicolaou G. General Black–Scholes models accounting for increased market volatility from hedging strategies // Appl. Math. Finance. 1998. V. 5. P. 45–82.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Frey R., Stremme A. Market volatility and feedback effects from dynamic hedging // Math. Finance. 1997. V. 7, N 4. P. 351–374.</mixed-citation><mixed-citation xml:lang="en">Frey R., Stremme A. Market volatility and feedback effects from dynamic hedging // Math. Finance. 1997. V. 7, N 4. P. 351–374.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Schonbucher P., Wilmott P. The feedback effect of hedging in illiquid markets. Tech. Rep. Oxford: Univ. Oxford, Math. Inst., Nov. 1993.</mixed-citation><mixed-citation xml:lang="en">Schonbucher P., Wilmott P. The feedback effect of hedging in illiquid markets. Tech. Rep. Oxford: Univ. Oxford, Math. Inst., Nov. 1993.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Brandimarte P. Numerical methods in finance &amp; economics. Hoboken, NJ: John Wiley &amp; Sons Publ., 2004.</mixed-citation><mixed-citation xml:lang="en">Brandimarte P. Numerical methods in finance &amp; economics. Hoboken, NJ: John Wiley &amp; Sons Publ., 2004.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Morelli M. J., Montagna G., Nicrosini O., Treccani M., Farina M., Amato P. Pricing financial derivatives with neural networks // Phys. A. 2004. V. 338. P. 160–165.</mixed-citation><mixed-citation xml:lang="en">Morelli M. J., Montagna G., Nicrosini O., Treccani M., Farina M., Amato P. Pricing financial derivatives with neural networks // Phys. A. 2004. V. 338. P. 160–165.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Овсянников Л. В. Групповой анализ дифференциальных уравнений. М.: Наука, 1978. 10. Gazizov R. K., Ibragimov N. H. Lie symmetry analysis of differential equations in finance // Nonlinear Dyn 1998. V. 17. P. 387–407.</mixed-citation><mixed-citation xml:lang="en">Овсянников Л. В. Групповой анализ дифференциальных уравнений. М.: Наука, 1978. 10. Gazizov R. K., Ibragimov N. H. Lie symmetry analysis of differential equations in finance // Nonlinear Dyn 1998. V. 17. P. 387–407.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Чиркунов Ю. А., Хабиров С. В. Элементы симметрийного анализа дифференциальных уравнений механики сплошной среды. Новосибирск: НГТУ, 2012.</mixed-citation><mixed-citation xml:lang="en">Чиркунов Ю. А., Хабиров С. В. Элементы симметрийного анализа дифференциальных уравнений механики сплошной среды. Новосибирск: НГТУ, 2012.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Bordag L. A., Chmakova A. Y. Explicit solutions for a nonlinear model of financial derivatives // Int. J. Theor. Appl. Finance. 2007. V. 10, N 1. P. 1–21.</mixed-citation><mixed-citation xml:lang="en">Bordag L. A., Chmakova A. Y. Explicit solutions for a nonlinear model of financial derivatives // Int. J. Theor. Appl. Finance. 2007. V. 10, N 1. P. 1–21.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Bordag L. A., Frey R. Pricing options in illiquid markets: symmetry reductions and exact solutions // Nonlinear models in mathematical finance: New research trends in option pricing (ed. M. Ehrhardt). Ch. 3. New York: Nova Sci. Publ., Inc., 2008. P. 83–109.</mixed-citation><mixed-citation xml:lang="en">Bordag L. A., Frey R. Pricing options in illiquid markets: symmetry reductions and exact solutions // Nonlinear models in mathematical finance: New research trends in option pricing (ed. M. Ehrhardt). Ch. 3. New York: Nova Sci. Publ., Inc., 2008. P. 83–109.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Bordag L. A. On option-valuation in illiquid markets: invariant solutions to a nonlinear model // Mathematical control theory and finance (eds. A. Sarychev, A. Shiryaev, M. Guerra, and M. R. Grossinho). Berlin; Heidelberg: Springer-Verl., 2008. P. 71–94.</mixed-citation><mixed-citation xml:lang="en">Bordag L. A. On option-valuation in illiquid markets: invariant solutions to a nonlinear model // Mathematical control theory and finance (eds. A. Sarychev, A. Shiryaev, M. Guerra, and M. R. Grossinho). Berlin; Heidelberg: Springer-Verl., 2008. P. 71–94.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Mikaelyan A. Analytical study of the Scho¨nbucher–Wilmott model of the feedback effect in illiquid markets: Master’s thes. (financial mathematics). Halmstad Univ., 2009. 16. Bordag L. A., Mikaelyan A. Models of self-financing hedging strategies in illiquid markets: symmetry reductions and exact solutions // J. Lett. Math. Phys 2011. V. 96, N 1–3. P. 191–207.</mixed-citation><mixed-citation xml:lang="en">Mikaelyan A. Analytical study of the Scho¨nbucher–Wilmott model of the feedback effect in illiquid markets: Master’s thes. (financial mathematics). Halmstad Univ., 2009. 16. Bordag L. A., Mikaelyan A. Models of self-financing hedging strategies in illiquid markets: symmetry reductions and exact solutions // J. Lett. Math. Phys 2011. V. 96, N 1–3. P. 191–207.</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>
