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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">mathnas</journal-id><journal-title-group><journal-title xml:lang="ru">Труды Института математики НАН Беларуси</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the Institute of Mathematics of the NAS of Belarus</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1812-5093</issn><publisher><publisher-name>Институт математики НАН Беларуси</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.67268/1812-5093-2026-34-1s-81-97</article-id><article-id custom-type="edn" pub-id-type="custom">ABKLPV</article-id><article-id custom-type="elpub" pub-id-type="custom">mathnas-187</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>ДИФФЕРЕНЦИАЛЬНЫЕ УРАВНЕНИЯ, ДИНАМИЧЕСКИЕ СИСТЕМЫ И ОПТИМАЛЬНОЕ УПРАВЛЕНИЕ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>DIFFERENTIAL EQUATIONS, DYNAMIC SYSTEMS AND OPTIMAL CONTROL</subject></subj-group></article-categories><title-group><article-title>Условия оптимальности первого и второго порядка в задаче векторной оптимизации с неопределенным отношением предпочтения</article-title><trans-title-group xml:lang="en"><trans-title>First and second-order optimality conditions in a vector optimization problem  with an uncertain preference relation</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>Гороховик</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Gorokhovik</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</p></bio><email xlink:type="simple">gorokh@im.bas-net.by</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>Беларусь</country></aff><aff xml:lang="en"><institution>Institute of Mathematics of the National Academy of Sciences of Belarus</institution><country>Belarus</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>07</day><month>11</month><year>2026</year></pub-date><volume>34</volume><issue>1s</issue><fpage>81</fpage><lpage>97</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Гороховик В.В., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Гороховик В.В.</copyright-holder><copyright-holder xml:lang="en">Gorokhovik V.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://mathnas.ejournal.by/jour/article/view/187">https://mathnas.ejournal.by/jour/article/view/187</self-uri><abstract><p>В данной статье рассматривается задача векторной оптимизации с неопределенным отношением предпочтения. Неопределенность обусловлена тем, что известно лишь семейство $\mathcal{P}$ отношений предпочтения, одно из которых реализуется на самом деле, причем конкретная реализация неизвестна. В качестве оптимального решения данной задачи в работе предлагается рассматривать такие допустимые решения, которые доставляют целевому отображению гарантированный (слабый, сильный) максимум относительно семейства $\mathcal{P}$, т.е. такие, которые доставляют отображению (слабый, сильный) максимум при любой конкретной реализации отношения предпочтения из $\mathcal{P}$. При некоторых предположениях относительно семейства $\mathcal{P}$ доказана теорема о скаляризации данной задачи векторной оптимизации при помощи разностно сублинейных функций. Эта теорема используется затем при выводе необходимых, а также достаточных условий первого и второго порядка гарантированной $\mathcal{P}$-максимальности допустимых решений. При этом необходимые условия получены для решений, доставляющих гарантированный слабый $\mathcal{P}$-максимум, а достаточные условия для решений, доставляющих гарантированный сильный $\mathcal{P}$-максимум.</p></abstract><trans-abstract xml:lang="en"><p>In this paper we consider a vector optimization problem with an uncertain preference relation. The uncertainty arises from the fact that only a family $\mathcal{P}$ of preference relations is known, one of which is actually realized, while the concrete realization is unknown. As an optimal solution of this problem, we propose to consider such admissible solutions that provide the objective mapping with the guaranteed (weak, strong) maximum relative to the family $\mathcal{P}$, i.e., those that provide the objective mapping with (weak, strong) maximum for any concrete realization of the preference relation from $\mathcal{P}$. Under some assumptions regarding the family $\mathcal{P}$, a theorem on the scalarization of this vector optimization problem by means of difference sublinear functions is proved. Then this theorem is used for deriving first- and second-order necessary and sufficient conditions for admissible solutions that provide the objective mapping with the guaranteed $\mathcal{P}$-maximum. The necessary conditions are established for solutions that provide the guaranteed weak $\mathcal{P}$-maximum, while the sufficient conditions are established for solutions that provide the guaranteed strong $\mathcal{P}$-maximum.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>векторная оптимизация</kwd><kwd>отношение предпочтения</kwd><kwd>неопределенность</kwd><kwd>скаляризация</kwd><kwd>$H$-дифференцируемость по направлениям</kwd><kwd>вторая производная по Фреше–Тэйлору</kwd><kwd>условия оптимальности первого и второго порядков</kwd></kwd-group><kwd-group xml:lang="en"><kwd>vector optimization</kwd><kwd>preference relation</kwd><kwd>uncertainty</kwd><kwd>scalarization</kwd><kwd>Hadamard directionally differentiability</kwd><kwd>second Frechet–Taylor derivative</kwd><kwd>first- and second-order optimality conditions</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа поддержана Институтом математики НАН Беларуси в рамках государственной программы научных исследований «Конвергенция–2030».</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">Гороховик В. 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