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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Discrete and Continuous Models and Applied Computational Science</journal-id><journal-title-group><journal-title xml:lang="en">Discrete and Continuous Models and Applied Computational Science</journal-title><trans-title-group xml:lang="ru"><trans-title>Discrete and Continuous Models and Applied Computational Science</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2658-4670</issn><issn publication-format="electronic">2658-7149</issn><publisher><publisher-name xml:lang="en">Peoples' Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">51149</article-id><article-id pub-id-type="edn">JWJLZN</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Physics and Astronomy</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Физика</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Bianchi-I Cosmological Model with Viscous Fluid and Nonlinear Spinor Field: a Qualitative Analysis</article-title><trans-title-group xml:lang="ru"><trans-title>Бианки-I космологическая модель с вязкой жидкостью и   нелинейным спинорным полем: качественный анализ</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Saha</surname><given-names>B. S.</given-names></name><name xml:lang="ru"><surname>Саха</surname><given-names>Б. С.</given-names></name></name-alternatives><email>-</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Rikhvitsky</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Рихвицкий</surname><given-names>В. В.</given-names></name></name-alternatives><email>-</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Joint Institute for Nuclear Research</institution></aff><aff><institution xml:lang="ru">Объединённый Институт Ядерных Исследований</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2007-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2007</year></pub-date><issue>3-4</issue><issue-title xml:lang="en">NO3-4 (2007)</issue-title><issue-title xml:lang="ru">№3-4 (2007)</issue-title><fpage>130</fpage><lpage>134</lpage><history><date date-type="received" iso-8601-date="2026-07-08"><day>08</day><month>07</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2007, Saha B.S., Rikhvitsky V.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2007, Саха Б.С., Рихвицкий В.В.</copyright-statement><copyright-year>2007</copyright-year><copyright-holder xml:lang="en">Saha B.S., Rikhvitsky V.V.</copyright-holder><copyright-holder xml:lang="ru">Саха Б.С., Рихвицкий В.В.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/miph/article/view/51149">https://journals.rudn.ru/miph/article/view/51149</self-uri><abstract xml:lang="en">A system of nonlinear spinor field and Bianchi type-I gravitational field in presence of a viscous fluid and $\Lambda$ term has been considered. A system of equations for volume scale $\tau$ and energy density $\varepsilon $ has been reduced. The system obtained has been solved for some special cases. It has been shown that the introduction of spinor field to the system radically changes the character of evolution, in particular for some special choice of parameters it leads to the unlimited growth of the energy density at the finite interval of time.</abstract><trans-abstract xml:lang="ru">Рассматривается система нелинейного спинорного и гравитационного полей типа Бианки-I (BI) в присутствии вязкой жидкости и $\Lambda$-члена. Выведена система уравнений для объёмного масштаба $\tau$ и плотности энергии вязкой жидкости $\varepsilon $. Полученная система решена для некоторых частных случаев. Было показано что введение спинорного поля в систему в корне изменяет характер эволюции, в частности, в некоторых специальных случаях это приводит к неограниченному росту плотности энергии за конечное время.</trans-abstract><kwd-group xml:lang="ru"><kwd>спинорное поле</kwd><kwd>вязкая жидкость</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Murphy G. L. // Phys. Rev. D. - Vol. 8. - 1973. - P. 4231.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Santos N. O., Dias R. S., Banerjee A. // J. Math. Phys. - Vol. 26. - 1985. - P. 876.</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Belinski V. A., Khalatnikov I. M. // J. of Experimental and Theoretical Physics. - Vol. 69. - 1975. - P. 401.</mixed-citation></ref><ref id="B4"><label>4.</label><mixed-citation>Saha B. // Mod. Phys. Lett. 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