<?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>2026-05-28T22:15:18Z</responseDate><request verb="GetRecord" identifier="oai:riuma.uma.es:10630/10838" metadataPrefix="qdc">https://riuma.uma.es/rest/oai/request</request><GetRecord><record><header><identifier>oai:riuma.uma.es:10630/10838</identifier><datestamp>2026-02-03T11:58:00Z</datestamp><setSpec>com_10630_2254</setSpec><setSpec>col_10630_37959</setSpec></header><metadata><qdc:qualifieddc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:doc="http://www.lyncode.com/xoai" xmlns:qdc="http://dspace.org/qualifieddc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 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>A new approach to the study of lightlike manifolds</dc:title>
   <dc:creator>Palomo-Ruiz, Francisco José</dc:creator>
   <dc:subject>Optica física</dc:subject>
   <dcterms:abstract>Proponemos un nuevo enfoque al estudio de las subvariedades luz, cuyo estudio hasta el momento dependía de una elección arbitraria de una distribución pantalla que hacía completamente inadecuado el estudio de la geometría intrínseca.  Las técnicas utilizarán geometrías de Cartan.</dcterms:abstract>
   <dcterms:dateAccepted>2015-12-18T11:37:50Z</dcterms:dateAccepted>
   <dcterms:available>2015-12-18T11:37:50Z</dcterms:available>
   <dcterms:created>2015-12-18T11:37:50Z</dcterms:created>
   <dcterms:issued>2015-12-18</dcterms:issued>
   <dc:type>conference output</dc:type>
   <dc:identifier>http://hdl.handle.net/10630/10838</dc:identifier>
   <dc:language>eng</dc:language>
   <dc:relation>First Joint Meeting Brazil-Spain in Mathematics</dc:relation>
   <dc:relation>Fortaleza (Brasil)</dc:relation>
   <dc:relation>Diciembre 2015</dc:relation>
   <dc:rights>open access</dc:rights>
   <dc:rights>by-nc-nd</dc:rights>
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