@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#> .

<https://rec.harvest-normandie.data4citizen.com/dataset/oai-hal-hal-00755966v2> a dcat:Dataset ;
    dct:description """
              The power of the disconjugacy properties of second-order differential equations of Schrödinger type to check the regularity of rationally-extended quantum potentials connected with exceptional orthogonal polynomials is illustrated by re-examining the extensions of the isotonic oscillator (or radial oscillator) potential derived in kth-order supersymmetric quantum mechanics or multistep Darboux-Bäcklund transformation method. The function arising in the potential denominator is proved to be a polynomial with a nonvanishing constant term, whose value is calculated by induction over k. The sign of this term being the same as that of the already known highest-degree term, the potential denominator has the same sign at both extremities of the definition interval, a property that is shared by the seed eigenfunction used in the potential construction. By virtue of disconjugacy, such a property implies the nodeless character of both the eigenfunction and the resulting potential.
            """ ;
    dct:identifier "hal-00755966" ;
    dct:issued "2026-06-01T05:40:28.293336"^^xsd:dateTime ;
    dct:language "en" ;
    dct:modified "2026-06-01T05:40:28.293345"^^xsd:dateTime ;
    dct:publisher <https://rec.harvest-normandie.data4citizen.com/organization/cce9db95-46d9-4dc2-84b6-764215d0a002> ;
    dct:title "Disconjugacy, regularity of multi-indexed rationally-extended potentials, and Laguerre exceptional polynomials" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "CCSD" ] ;
    dcat:distribution <https://rec.harvest-normandie.data4citizen.com/dataset/oai-hal-hal-00755966v2/resource/0e18d746-f790-448a-80df-01017814b5f3> ;
    dcat:keyword "infoeu-reposemanticspreprint",
        "mathmath-mpmathematics-mathmathematical-physics-math-ph",
        "orthogonal-polynomials",
        "physmphyphysics-physicsmathematical-physics-math-ph",
        "physqphyphysics-physicsquantum-physics-quant-ph",
        "preprints-working-papers-",
        "quantum-mechanics",
        "supersymmetry" ;
    dcat:landingPage <https://hal.science/hal-00755966> .

<https://rec.harvest-normandie.data4citizen.com/dataset/oai-hal-hal-00755966v2/resource/0e18d746-f790-448a-80df-01017814b5f3> a dcat:Distribution ;
    dct:format "HTML" ;
    dct:issued "2026-06-01T05:40:28.384362"^^xsd:dateTime ;
    dct:modified "2026-06-01T05:40:28.254183"^^xsd:dateTime ;
    dct:title "Disconjugacy, regularity of multi-indexed rationally-extended potentials, and Laguerre exceptional polynomials" ;
    dcat:accessURL <https://hal.science/hal-00755966> .

<https://rec.harvest-normandie.data4citizen.com/organization/cce9db95-46d9-4dc2-84b6-764215d0a002> a foaf:Agent ;
    foaf:name "test_moissonnage_selune" .

<https://hal.science/hal-00755966> a foaf:Document .