<?xml version="1.0" encoding="utf-8"?>
		<vdex xmlns="http://www.imsglobal.org/xsd/imsvdex_v1p0"  orderSignificant="false" language="en">
    <vocabIdentifier>http://AATesaurus.cultura.gencat.cat/aat/getty_en</vocabIdentifier><term><termIdentifier>http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31299806</termIdentifier><caption>series</caption></term>  <relationship>      <sourceTerm>http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31299806</sourceTerm>      <targetTerm vocabIdentifier="http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31297680">mathematical concepts</targetTerm>      <relationshipType source="http://www.imsglobal.org/vocabularies/iso2788_relations.xml">BT</relationshipType>  </relationship>  <relationship>      <sourceTerm>http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31299806</sourceTerm>      <targetTerm vocabIdentifier="http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31308447">scales</targetTerm>      <relationshipType source="http://www.imsglobal.org/vocabularies/iso2788_relations.xml">NT</relationshipType>  </relationship>  <relationship>      <sourceTerm>http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31299806</sourceTerm>      <targetTerm vocabIdentifier="http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31308443">arithmetic progressions</targetTerm>      <relationshipType source="http://www.imsglobal.org/vocabularies/iso2788_relations.xml">NT</relationshipType>  </relationship>  <relationship>      <sourceTerm>http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31299806</sourceTerm>      <targetTerm vocabIdentifier="http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31308441">summations</targetTerm>      <relationshipType source="http://www.imsglobal.org/vocabularies/iso2788_relations.xml">NT</relationshipType>  </relationship>  <relationship>      <sourceTerm>http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31299806</sourceTerm>      <targetTerm vocabIdentifier="http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31308436">Fibonacci numbers</targetTerm>      <relationshipType source="http://www.imsglobal.org/vocabularies/iso2788_relations.xml">NT</relationshipType>  </relationship>  <relationship>      <sourceTerm>http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31299806</sourceTerm>      <targetTerm vocabIdentifier="http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31299807">progressions</targetTerm>      <relationshipType source="http://www.imsglobal.org/vocabularies/iso2788_relations.xml">UF</relationshipType>  </relationship></vdex>