<?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>2026-04-17T13:18:00Z</responseDate><request verb="GetRecord" identifier="oai:www.recercat.cat:2072/445050" metadataPrefix="qdc">https://recercat.cat/oai/request</request><GetRecord><record><header><identifier>oai:recercat.cat:2072/445050</identifier><datestamp>2024-11-18T01:27:26Z</datestamp><setSpec>com_2072_98</setSpec><setSpec>col_2072_378192</setSpec></header><metadata><qdc:qualifieddc xmlns:qdc="http://dspace.org/qualifieddc/" xmlns:dc="http://purl.org/dc/elements/1.1/" 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://purl.org/dc/elements/1.1/ http://dublincore.org/schemas/xmls/qdc/2006/01/06/dc.xsd http://purl.org/dc/terms/ http://dublincore.org/schemas/xmls/qdc/2006/01/06/dcterms.xsd http://dspace.org/qualifieddc/ http://www.ukoln.ac.uk/metadata/dcmi/xmlschema/qualifieddc.xsd">
   <dc:title>Tangential trapezoid central configurations</dc:title>
   <dc:creator>Yuan, Pengfei</dc:creator>
   <dc:creator>Llibre, Jaume</dc:creator>
   <dc:subject>Convex central configuration</dc:subject>
   <dc:subject>Four-body problem</dc:subject>
   <dc:subject>Tangential trapezoid</dc:subject>
   <dcterms:abstract>A tangential trapezoid, also called a circumscribed trapezoid, is a trapezoid whose four sides are all tangent to a circle within the trapezoid: the in-circle or inscribed circle. In this paper we classify all planar four-body central configurations, where the four bodies are at the vertices of a tangential trapezoid.</dcterms:abstract>
   <dcterms:issued>2020</dcterms:issued>
   <dc:type>Article</dc:type>
   <dc:relation>Ministerio de Economía y Competitividad MTM2016-77278-P</dc:relation>
   <dc:relation>Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1617</dc:relation>
   <dc:relation>European Commission 777911</dc:relation>
   <dc:relation>Regular and Chaotic Dynamics ; Vol. 25, Issue 6 (November 2020), p. 651-661</dc:relation>
   <dc:rights>open access</dc:rights>
   <dc:rights>Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.</dc:rights>
   <dc:rights>https://rightsstatements.org/vocab/InC/1.0/</dc:rights>
   <dc:publisher/>
</qdc:qualifieddc></metadata></record></GetRecord></OAI-PMH>