<?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>2026-08-20T02:11:07Z</responseDate><request verb="GetRecord" identifier="oai:docta.ucm.es:20.500.14352/59724" metadataPrefix="mets">https://docta.ucm.es/rest/oai/request</request><GetRecord><record><header><identifier>oai:docta.ucm.es:20.500.14352/59724</identifier><datestamp>2023-08-26T13:21:58Z</datestamp><setSpec>com_20.500.14352_14</setSpec><setSpec>col_20.500.14352_15</setSpec></header><metadata><mets xmlns="http://www.loc.gov/METS/" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:doc="http://www.lyncode.com/xoai" ID="&#xa;&#x9;&#x9;&#x9;&#x9;DSpace_ITEM_20.500.14352-59724" TYPE="DSpace ITEM" PROFILE="DSpace METS SIP Profile 1.0" xsi:schemaLocation="http://www.loc.gov/METS/ http://www.loc.gov/standards/mets/mets.xsd" OBJID="&#xa;&#x9;&#x9;&#x9;&#x9;hdl:20.500.14352/59724">
   <metsHdr CREATEDATE="2026-08-20T04:11:07Z">
      <agent ROLE="CUSTODIAN" TYPE="ORGANIZATION">
         <name>Docta Complutense</name>
      </agent>
   </metsHdr>
   <dmdSec ID="DMD_20.500.14352_59724">
      <mdWrap MDTYPE="MODS">
         <xmlData xmlns:mods="http://www.loc.gov/mods/v3" xsi:schemaLocation="http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-1.xsd">
            <mods:mods xsi:schemaLocation="http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-1.xsd">
               <mods:name>
                  <mods:role>
                     <mods:roleTerm type="text">author</mods:roleTerm>
                  </mods:role>
                  <mods:namePart>González López, Artemio</mods:namePart>
               </mods:name>
               <mods:name>
                  <mods:role>
                     <mods:roleTerm type="text">author</mods:roleTerm>
                  </mods:role>
                  <mods:namePart>Kamran, Niky</mods:namePart>
               </mods:name>
               <mods:extension>
                  <mods:dateAccessioned encoding="iso8601">2023-06-20T20:09:56Z</mods:dateAccessioned>
               </mods:extension>
               <mods:extension>
                  <mods:dateAvailable encoding="iso8601">2023-06-20T20:09:56Z</mods:dateAvailable>
               </mods:extension>
               <mods:originInfo>
                  <mods:dateIssued encoding="iso8601">1998-07</mods:dateIssued>
               </mods:originInfo>
               <mods:identifier type="issn">0393-0440</mods:identifier>
               <mods:identifier type="doi">10.1016/S0393-0440(97)00044-2</mods:identifier>
               <mods:identifier type="uri">https://hdl.handle.net/20.500.14352/59724</mods:identifier>
               <mods:identifier type="officialurl">http://dx.doi.org/10.1016/S0393-0440(97)00044-2</mods:identifier>
               <mods:identifier type="relatedurl">http://www.sciencedirect.comhttp://arxiv.org/abs/hep-th/9612100</mods:identifier>
               <mods:abstract>A generalization of the classical one-dimensional Darboux transformation to arbitrary n- dimensional oriented Riemannian manifolds is constructed using an intrinsic formulation based on the properties of twisted Hodge Laplacians. The classical two-dimensional Moutard  transformation is also generalized to non-compact oriented Riemannian manifolds of  dimension n ≥ 2. New examples of quasi-exactly solvable multidimensional matrix  Schrödinger  operators on curved manifolds are obtained by applying the above results.</mods:abstract>
               <mods:language>
                  <mods:languageTerm authority="rfc3066">eng</mods:languageTerm>
               </mods:language>
               <mods:accessCondition type="useAndReproduction"/>
               <mods:titleInfo>
                  <mods:title>The Multidimensional Darboux transformation</mods:title>
               </mods:titleInfo>
               <mods:genre>journal article</mods:genre>
            </mods:mods>
         </xmlData>
      </mdWrap>
   </dmdSec>
   <amdSec ID="FO_20.500.14352_59724_1">
      <techMD ID="TECH_O_20.500.14352_59724_1">
         <mdWrap MDTYPE="PREMIS">
            <xmlData xmlns:premis="http://www.loc.gov/standards/premis" xsi:schemaLocation="http://www.loc.gov/standards/premis http://www.loc.gov/standards/premis/PREMIS-v1-0.xsd">
               <premis:premis>
                  <premis:object>
                     <premis:objectIdentifier>
                        <premis:objectIdentifierType>URL</premis:objectIdentifierType>
                        <premis:objectIdentifierValue>https://docta.ucm.es/bitstreams/afb91edf-729a-484d-9c7b-1210a9d693ff/download</premis:objectIdentifierValue>
                     </premis:objectIdentifier>
                     <premis:objectCategory>File</premis:objectCategory>
                     <premis:objectCharacteristics>
                        <premis:fixity>
                           <premis:messageDigestAlgorithm>MD5</premis:messageDigestAlgorithm>
                           <premis:messageDigest>8271324ac9e1e7fa992fd815bba12420</premis:messageDigest>
                        </premis:fixity>
                        <premis:size>229431</premis:size>
                        <premis:format>
                           <premis:formatDesignation>
                              <premis:formatName>application/pdf</premis:formatName>
                           </premis:formatDesignation>
                        </premis:format>
                     </premis:objectCharacteristics>
                     <premis:originalName>gonzalezlopez39preprint.pdf</premis:originalName>
                  </premis:object>
               </premis:premis>
            </xmlData>
         </mdWrap>
      </techMD>
   </amdSec>
   <amdSec ID="FT_20.500.14352_59724_3">
      <techMD ID="TECH_T_20.500.14352_59724_3">
         <mdWrap MDTYPE="PREMIS">
            <xmlData xmlns:premis="http://www.loc.gov/standards/premis" xsi:schemaLocation="http://www.loc.gov/standards/premis http://www.loc.gov/standards/premis/PREMIS-v1-0.xsd">
               <premis:premis>
                  <premis:object>
                     <premis:objectIdentifier>
                        <premis:objectIdentifierType>URL</premis:objectIdentifierType>
                        <premis:objectIdentifierValue>https://docta.ucm.es/bitstreams/c20e0735-b7a0-4076-a0e1-b164a203f330/download</premis:objectIdentifierValue>
                     </premis:objectIdentifier>
                     <premis:objectCategory>File</premis:objectCategory>
                     <premis:objectCharacteristics>
                        <premis:fixity>
                           <premis:messageDigestAlgorithm>MD5</premis:messageDigestAlgorithm>
                           <premis:messageDigest>0368cff1bce77e294db6f30ab5754ccd</premis:messageDigest>
                        </premis:fixity>
                        <premis:size>56125</premis:size>
                        <premis:format>
                           <premis:formatDesignation>
                              <premis:formatName>text/plain</premis:formatName>
                           </premis:formatDesignation>
                        </premis:format>
                     </premis:objectCharacteristics>
                     <premis:originalName>gonzalezlopez39preprint.pdf.txt</premis:originalName>
                  </premis:object>
               </premis:premis>
            </xmlData>
         </mdWrap>
      </techMD>
   </amdSec>
   <fileSec>
      <fileGrp USE="ORIGINAL">
         <file ID="BITSTREAM_ORIGINAL_20.500.14352_59724_1" MIMETYPE="application/pdf" SEQ="1" SIZE="229431" CHECKSUM="8271324ac9e1e7fa992fd815bba12420" CHECKSUMTYPE="MD5" ADMID="FO_20.500.14352_59724_1" GROUPID="GROUP_BITSTREAM_20.500.14352_59724_1">
            <FLocat LOCTYPE="URL" xlink:type="simple" xlink:href="https://docta.ucm.es/bitstreams/afb91edf-729a-484d-9c7b-1210a9d693ff/download"/>
         </file>
      </fileGrp>
      <fileGrp USE="TEXT">
         <file ID="BITSTREAM_TEXT_20.500.14352_59724_3" MIMETYPE="text/plain" SEQ="3" SIZE="56125" CHECKSUM="0368cff1bce77e294db6f30ab5754ccd" CHECKSUMTYPE="MD5" ADMID="FT_20.500.14352_59724_3" GROUPID="GROUP_BITSTREAM_20.500.14352_59724_3">
            <FLocat LOCTYPE="URL" xlink:type="simple" xlink:href="https://docta.ucm.es/bitstreams/c20e0735-b7a0-4076-a0e1-b164a203f330/download"/>
         </file>
      </fileGrp>
   </fileSec>
   <structMap LABEL="DSpace Object" TYPE="LOGICAL">
      <div TYPE="DSpace Object Contents" ADMID="DMD_20.500.14352_59724">
         <div TYPE="DSpace BITSTREAM">
            <fptr FILEID="BITSTREAM_ORIGINAL_20.500.14352_59724_1"/>
         </div>
      </div>
   </structMap>
</mets></metadata></record></GetRecord></OAI-PMH>