<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE root>
<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">Contemporary Mathematics. Fundamental Directions</journal-id><journal-title-group><journal-title xml:lang="en">Contemporary Mathematics. Fundamental Directions</journal-title><trans-title-group xml:lang="ru"><trans-title>Современная математика. Фундаментальные направления</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2413-3639</issn><issn publication-format="electronic">2949-0618</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">31862</article-id><article-id pub-id-type="doi">10.22363/2413-3639-2022-68-3-407-423</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</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">Order Projection in OAr(E,F)</article-title><trans-title-group xml:lang="ru"><trans-title>Порядковое проектирование в OAr(E,F)</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Dzhusoeva</surname><given-names>N. A.</given-names></name><name xml:lang="ru"><surname>Джусоева</surname><given-names>Н. А.</given-names></name></name-alternatives><email>dhusoevanonna@rambler.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Itarova</surname><given-names>S. Yu.</given-names></name><name xml:lang="ru"><surname>Итарова</surname><given-names>С. Ю.</given-names></name></name-alternatives><email>svetlana.itarova1991@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Pliev</surname><given-names>M. A.</given-names></name><name xml:lang="ru"><surname>Плиев</surname><given-names>М. А.</given-names></name></name-alternatives><email>plimarat@yandex.ru</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">North Ossetian State University named after K. L. Khetagurov</institution></aff><aff><institution xml:lang="ru">Северо-Осетинский государственный университет им. К.Л. Хетагурова</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Southern Mathematical Institute of the Vladikavkaz Scientific Center of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Южный математический институт ВНЦ РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-09-08" publication-format="electronic"><day>08</day><month>09</month><year>2022</year></pub-date><volume>68</volume><issue>3</issue><issue-title xml:lang="en">Proceedings of the Crimean Autumn Mathematical School-Symposium</issue-title><issue-title xml:lang="ru">Труды Крымской осенней математической школы-симпозиума</issue-title><fpage>407</fpage><lpage>423</lpage><history><date date-type="received" iso-8601-date="2022-09-08"><day>08</day><month>09</month><year>2022</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, Contemporary Mathematics. Fundamental Directions</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, Современная математика. Фундаментальные направления</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">Contemporary Mathematics. Fundamental Directions</copyright-holder><copyright-holder xml:lang="ru">Современная математика. Фундаментальные направления</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/CMFD/article/view/31862">https://journals.rudn.ru/CMFD/article/view/31862</self-uri><abstract xml:lang="en"><p style="text-align: justify;">We investigate order projections onto different bands in the space of all regular orthogonally additive operators. In particular, we obtain formulas for calculation of the order projections onto the band generated by a directed set of positive orthogonally additive operators and onto the band of all laterally continuous operators.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">В работе изучается операторы порядкового проектирования на различные полосы в пространстве регулярных ортогонально аддитивных операторов. Указаны формулы проектирования на полосу, порожденную направленным семейством положительных ортогонально аддитивных операторов, а также на полосу латерально непрерывных операторов.</p></trans-abstract><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Абасов Н.М. О сумме узких ортогонально аддитивных операторов// Изв. вузов. Сер. Мат.- 2020.- 64, № 7.- С. 3-9.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Колесников Е.В. Разложение положительного оператора// Сиб. мат. ж.- 1989.- 30, № 5.- С. 77-79.</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Колесников Е.В. Несколько порядковых проекторов, поржденных идеалами векторной решетки// Сиб. мат. ж. - 1995.- 36, № 6.- С. 1342-1349.</mixed-citation></ref><ref id="B4"><label>4.</label><mixed-citation>Колесников Е.В. В тени положительного оператора// Сиб. мат. ж. -1996.- 37, № 3.- С. 592-598.</mixed-citation></ref><ref id="B5"><label>5.</label><mixed-citation>Красносельский М.А., Забрейко П.П., Пустыльник Е.И., Соболевский П.Е. Интегральные операторы в пространствах суммируемых функций. -М.: Наука, 1966.</mixed-citation></ref><ref id="B6"><label>6.</label><mixed-citation>Кусраев А.Г. Мажорируемые операторы.- М.: Наука, 2003.</mixed-citation></ref><ref id="B7"><label>7.</label><mixed-citation>Кусраев А.Г., Кутателадзе С.С. Введение в булевозначный анализ.-М.: Наука, 2005.</mixed-citation></ref><ref id="B8"><label>8.</label><mixed-citation>Кутателадзе С.С. Об осколках положительных операторов// Сиб. мат. ж. - 1989.- 30, № 5.- С. 111-119.</mixed-citation></ref><ref id="B9"><label>9.</label><mixed-citation>Плиев М.А., Попов М.М. О продолжении абстрактных операторов Урысона// Сиб. мат. ж. - 2016.- 57, № 3.- С. 700-708.</mixed-citation></ref><ref id="B10"><label>10.</label><mixed-citation>Abasov N. Completely additive and C-compact operators in lattice-normed spaces// Ann. Funct. Anal.- 2020.-11, № 4.- С. 914-928.</mixed-citation></ref><ref id="B11"><label>11.</label><mixed-citation>Abasov N. On band preserving orthogonally additive operators// Sib. Elektron. Mat. Izv. -2021.-` 18, № 1. -С. 495-510.</mixed-citation></ref><ref id="B12"><label>12.</label><mixed-citation>Abasov N. On a band generated by a disjointness dreserving orthogonally additive operator// Lobachevskii J. Math. - 2021.- 42, № 5.-С. 851-856.</mixed-citation></ref><ref id="B13"><label>13.</label><mixed-citation>Abasov N., Pliev M. On extensions of some nonlinear maps in vector lattices// J. Math. Anal. Appl. - 2017.-455, № 1.-С. 516-527.</mixed-citation></ref><ref id="B14"><label>14.</label><mixed-citation>Aliprantis C., Burkinshaw O. The components of the positive operator// Math. Z.- 1983.- 185.- С. 245- 257.</mixed-citation></ref><ref id="B15"><label>15.</label><mixed-citation>Aliprantis C., Burkinshaw O. Projecting onto the band of kernel operators// Houston J. Math.- 1985.- 11, № 1.- С. 7-13.</mixed-citation></ref><ref id="B16"><label>16.</label><mixed-citation>Aliprantis C., Burkinshaw O. Positive Operators.- Dordrecht: Springer, 2006.</mixed-citation></ref><ref id="B17"><label>17.</label><mixed-citation>Appell J., Zabrejko P.P. Nonlinear superposition operators.-Cambridge: Cambridge Univ. Press, 1990.</mixed-citation></ref><ref id="B18"><label>18.</label><mixed-citation>Ben Amor M., Pliev M. Laterally continuous part of an abstract Uryson operator// Int. J. Math. Anal.- 2013.-7, № 58.- С. 2853-2860.</mixed-citation></ref><ref id="B19"><label>19.</label><mixed-citation>Erkursun Ozcan N., Pliev M. On orthogonally additive operators in C-complete vector lattices// Banach J. Math. Anal. -2022.-16, № 1.- Article No. 6.</mixed-citation></ref><ref id="B20"><label>20.</label><mixed-citation>Feldman W.A. A factorization for orthogonally additive operators on Banach lattices// J. Math. Anal. Appl. - 2019.- 472, № 1. -С. 238-245.</mixed-citation></ref><ref id="B21"><label>21.</label><mixed-citation>Fotiy O., Gumenchuk A., Krasikova I., Popov M. On sums of narrow and compact operators// Positivity.- 2012.-24, № 1.- С. 69-80.</mixed-citation></ref><ref id="B22"><label>22.</label><mixed-citation>Huijsmans C.B., de Pagter B. Disjointness preserving and diffuse operators// Compos. Math.- 1991.- 79.-С. 351-374.</mixed-citation></ref><ref id="B23"><label>23.</label><mixed-citation>Maz´on J.M., Segura de Leo´n S. Order bounded ortogonally additive operators// Rev. Roumaine Math. Pures Appl. -1990.- 35, № 4.- С. 329-353.</mixed-citation></ref><ref id="B24"><label>24.</label><mixed-citation>Maz´on J.M., Segura de Leo´n S. Uryson operators//Rev. Roumaine Math. Pures Appl. -1990.-35, №5.- С. 441-449.</mixed-citation></ref><ref id="B25"><label>25.</label><mixed-citation>Mykhaylyuk V., Pliev M., Popov M. The lateral order on Riesz spaces and orthogonally additive operators// Positivity.- 2021.- 25, № 2.-С. 291-327.</mixed-citation></ref><ref id="B26"><label>26.</label><mixed-citation>de Pagter B. The components of a positive operator// Indag. Math. -1983.- 48.- С. 229-241.</mixed-citation></ref><ref id="B27"><label>27.</label><mixed-citation>Pliev M. On C-compact orthogonally additive operators// J. Math. Anal. Appl. - 2021.- 494.-Article No. 124594.</mixed-citation></ref><ref id="B28"><label>28.</label><mixed-citation>Pliev M., Polat F., Weber M.R. Narrow and C-compact orthogonally additive operators in lattice-normed spaces// Results Math. -2019.- 74, № 4. -Article No. 157.</mixed-citation></ref><ref id="B29"><label>29.</label><mixed-citation>Pliev M., Popov M. Dominated Uryson operators// Int. J. Math. Anal. -2014.-8, № 22.- С. 1051-1059.</mixed-citation></ref><ref id="B30"><label>30.</label><mixed-citation>Pliev M., Ramdane K. Order unbounded orthogonally additive operators in vector lattices// Mediterr. J. Math. - 2018.- 15, № 2.-Article No. 55.</mixed-citation></ref><ref id="B31"><label>31.</label><mixed-citation>Pliev M., Weber M.R. Disjointness and order projections in the vector lattices of abstract Uryson operators// Positivity.-2016.-20, № 3. -С. 695-707.</mixed-citation></ref></ref-list></back></article>
