<?xml version="1.0" encoding="UTF-8"?><?xml-stylesheet type="text/xsl" href="static/style.xsl"?><OAI-PMH xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd"><responseDate>2026-04-17T15:40:54Z</responseDate><request verb="GetRecord" identifier="oai:www.recercat.cat:2117/363198" metadataPrefix="marc">https://recercat.cat/oai/request</request><GetRecord><record><header><identifier>oai:recercat.cat:2117/363198</identifier><datestamp>2026-02-06T04:26:45Z</datestamp><setSpec>com_2072_1033</setSpec><setSpec>col_2072_452950</setSpec></header><metadata><record xmlns="http://www.loc.gov/MARC21/slim" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:doc="http://www.lyncode.com/xoai" xsi:schemaLocation="http://www.loc.gov/MARC21/slim http://www.loc.gov/standards/marcxml/schema/MARC21slim.xsd">
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      <subfield code="a">Román Roy, Narciso</subfield>
      <subfield code="e">author</subfield>
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      <subfield code="c">2020</subfield>
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      <subfield code="a">A complete geometric classification of symmetries of autonomous Hamiltonian systems is established; explaining how to obtain their associated conserved quantities in all cases. In particular, first we review well-known results and properties about the symmetries of the Hamiltonian and of the symplectic form and then some new kinds of non-symplectic symmetries and their conserved quantities are introduced and studied.</subfield>
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   <datafield ind2=" " ind1=" " tag="520">
      <subfield code="a">I acknowledge the financial support from the Spanish Ministerio de Econom´ıa y Competitividad project&#xd;
MTM2014–54855–P, the Ministerio de Ciencia, Innovaci´on y Universidades project PGC2018-098265-BC33, and the Secretary of University and Research of the Ministry of Business and Knowledge of the&#xd;
Catalan Government project 2017–SGR–932. I also greatly appreciate the comments and suggestions of&#xd;
Prof. Mikhail S. Plyushchay. Finally, my thanks to the referees for their extensive and valuable comments&#xd;
that have allowed me to significantly improve the final version of the work.</subfield>
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      <subfield code="a">Postprint (author's final draft)</subfield>
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   <datafield tag="653" ind2=" " ind1=" ">
      <subfield code="a">Àrees temàtiques de la UPC::Matemàtiques i estadística::Matemàtica aplicada a les ciències</subfield>
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      <subfield code="a">Nonlinear systems</subfield>
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      <subfield code="a">Hamiltonian systems</subfield>
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      <subfield code="a">Field theory (Physics)</subfield>
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      <subfield code="a">Symmetries</subfield>
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      <subfield code="a">Conserved quantities</subfield>
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   <datafield tag="653" ind2=" " ind1=" ">
      <subfield code="a">Hamiltonian systems</subfield>
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      <subfield code="a">Noether theorem</subfield>
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      <subfield code="a">Symplectic manifolds</subfield>
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      <subfield code="a">Sistemes no lineals</subfield>
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      <subfield code="a">Hamilton, Sistemes de</subfield>
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      <subfield code="a">Camps, Teoria dels (Física)</subfield>
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      <subfield code="a">Classificació AMS::70 Mechanics of particles and systems::70K Nonlinear dynamics</subfield>
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      <subfield code="a">Classificació AMS::70 Mechanics of particles and systems::70H Hamiltonian and Lagrangian mechanics</subfield>
   </datafield>
   <datafield tag="653" ind2=" " ind1=" ">
      <subfield code="a">Classificació AMS::70 Mechanics of particles and systems::70S Classical field theories</subfield>
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   <datafield ind2="0" ind1="0" tag="245">
      <subfield code="a">A summary on symmetries and conserved quantities of autonomous Hamiltonian systems</subfield>
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