human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "does the arxiv lead to higher citations and reduced publisher downloads for mathematics articles"
  Abstract: An analysis of 2, 765 articles published in four math journals from 1997 to 2005 indicate that articles deposited in the arXiv received 35% more citations on average than non-deposited articles (an advantage of about 1.1 citations per article), and that this difference was most pronounced for highly-cited articles. Open Access, Early View, and Quality Differential were examined as three non-exclusive postulates for explaining the citation advantage. There was little support for a universal Open Access explanation, and no empirical support for Early View. There was some inferential support for a Quality Differential brought about by more highly-citable articles being deposited in the arXiv. In spite of their citation advantage, arXiv-deposited articles received 23% fewer downloads from the publisher’s website (about 10 fewer downloads per article) in all but the most recent two years after publication. The data suggest that arXiv and the publisher’s website may be fulfilling distinct functional needs of the reader.

Connected through hyperedge HE-1 (induced by source paper "arxiv and the ref open access policy"):
  with members:
    - "comparing published scientific journal articles to their pre print versions"
    - "comparing published scientific journal articles to their pre print versions"
    - "arxiv e prints and the journal of record an analysis of roles and relationships"
    - "the effect of open access upon citation impact an analysis of arxiv s condensed matter section"

Connected through hyperedge HE-2 (induced by source paper "disentangling gold open access"):
  with members:
    - "green and gold open access percentages and growth by discipline"
    - "self selected or mandated open access increases citation impact for higher quality research"
    - "positional effects on citation and readership in arxiv"

Connected through hyperedge HE-3 (induced by source paper "green open access in computer science an exploratory study on author based self archiving awareness practice and inhibitors"):
  with members:
    - "a framework for systematic analysis of open access journals and its application in software engineering and information systems"
    - "green and gold open access percentages and growth by discipline"
    - "ten year cross disciplinary comparison of the growth of open access and how it increases research citation impact"
    - "the effect of use and access on citations"

Connected through hyperedge HE-4 (induced by source paper "on full text download and citation distributions in scientific scholarly journals"):
  with members:
    - "usage impact factor the effects of sample characteristics on usage based impact metrics"
    - "worldwide use and impact of the nasa astrophysics data system digital library"
    - "the bibliometric properties of article readership information"

Connected through hyperedge HE-5 (induced by source paper "arxiv e prints and the journal of record an analysis of roles and relationships"):
  with members:
    - "last but not least additional positional effects on citation and readership in arxiv"
    - "citing and reading behaviours in high energy physics how a community stopped worrying about journals and learned to love repositories"
    - "positional effects on citation and readership in arxiv"
    - "e prints and journal articles in astronomy a productive co existence"
    - "the convergence of digital libraries and the peer review process"
    - "the effect of use and access on citations"
    - "scholarly communication and the continuum of electronic publishing"

Connected through hyperedge HE-6 (induced by source paper "the potential of preprints to accelerate scholarly communication a bibliometric analysis based on selected journals"):
  with members:
    - "e prints and journal articles in astronomy a productive co existence"
    - "the convergence of digital libraries and the peer review process"

Connected through hyperedge HE-7 (induced by source paper "self selected or mandated open access increases citation impact for higher quality research"):
  with members:
    - "use of astronomical literature a report on usage patterns"
    - "a principal component analysis of 39 scientific impact measures"
    - "offloading cognition onto cognitive technology"
    - "open access scientometrics and the uk research assessment exercise"
    - "open access does not increase citations for research articles from the astrophysical journal"
    - "effect of e printing on citation rates in astronomy and physics"
    - "ten year cross disciplinary comparison of the growth of open access and how it increases research citation impact"
    - "the effect of use and access on citations"

Connected through hyperedge HE-8 (induced by source paper "citing and reading behaviours in high energy physics how a community stopped worrying about journals and learned to love repositories"):
  with members:
    - "innovation in scholarly communication vision and projects from high energy physics"
    - "author choice open access publishing in the biological and medical literature a citation analysis"
    - "information resources in high energy physics surveying the present landscape and charting the future course"
    - "open access does not increase citations for research articles from the astrophysical journal"
    - "the effect of open access upon citation impact an analysis of arxiv s condensed matter section"

Question: Please tell me which class the center node belongs to. The 40 classes are: cs.NA(Numerical Analysis), cs.MM(Multimedia), cs.LO(Logic in Computer Science), cs.CY(Computers and Society), cs.CR(Cryptography and Security), cs.DC(Distributed, Parallel, and Cluster Computing), cs.HC(Human-Computer Interaction), cs.CE(Computational Engineering, Finance, and Science), cs.NI(Networking and Internet Architecture), cs.CC(Computational Complexity), cs.AI(Artificial Intelligence), cs.MA(Multiagent Systems), cs.GL(General Literature), cs.NE(Neural and Evolutionary Computing), cs.SC(Symbolic Computation), cs.AR(Hardware Architecture), cs.CV(Computer Vision and Pattern Recognition), cs.GR(Graphics), cs.ET(Emerging Technologies), cs.SY(Systems and Control), cs.CG(Computational Geometry), cs.OH(Other Computer Science), cs.PL(Programming Languages), cs.SE(Software Engineering), cs.LG(Machine Learning), cs.SD(Sound), cs.SI(Social and Information Networks), cs.RO(Robotics), cs.IT(Information Theory), cs.PF(Performance), cs.CL(Computation and Language), cs.IR(Information Retrieval), cs.MS(Mathematical Software), cs.FL(Formal Languages and Automata Theory), cs.DS(Data Structures and Algorithms), cs.OS(Operating Systems), cs.GT(Computer Science and Game Theory), cs.DB(Databases), cs.DL(Digital Libraries), cs.DM(Discrete Mathematics). Directly output the class name.

gpt: cs.DL(Digital Libraries)