@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

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    dct:description """
              We give a method for constructing explicit non-trivial elements in the third K-group (modulo torsion) of an imaginary quadratic number field. These arise from the relative homology of the map attaching the Borel-Serre boundary to the orbit space of the SL_2 group over the ring of imaginary quadratic integers on its symmetric space - hyperbolic three-space. We provide an algorithm which produces a chain of matrix quadruples specifying our element of K_3 of the field, modulo torsion. We carry out the algorithm for the Eisenteinian integers as well as for the imaginary quadratic integers of discriminant -7.
            """ ;
    dct:identifier "hal-00975454" ;
    dct:issued "2026-05-05T16:00:30.731612"^^xsd:dateTime ;
    dct:language "en" ;
    dct:modified "2026-05-05T16:00:30.731616"^^xsd:dateTime ;
    dct:publisher <https://rec.harvest-normandie.data4citizen.com/organization/cce9db95-46d9-4dc2-84b6-764215d0a002> ;
    dct:title "The image of the Borel-Serre bordification in algebraic K-theory" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "CCSD" ] ;
    dcat:distribution <https://rec.harvest-normandie.data4citizen.com/dataset/oai-hal-hal-00975454v1/resource/f6f4419b-0834-44ac-b3c2-80fbe83f8ff1> ;
    dcat:keyword "infoeu-reposemanticspreprint",
        "mathmath-ktmathematics-mathk-theory-and-homology-mathkt",
        "preprints-working-papers-" ;
    dcat:landingPage <https://hal.science/hal-00975454> .

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    dct:format "HTML" ;
    dct:issued "2026-05-05T16:00:30.733849"^^xsd:dateTime ;
    dct:modified "2026-05-05T16:00:30.726795"^^xsd:dateTime ;
    dct:title "The image of the Borel-Serre bordification in algebraic K-theory" ;
    dcat:accessURL <https://hal.science/hal-00975454> .

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