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: "a unified approach to mapping and clustering of bibliometric networks"
  Abstract: In the analysis of bibliometric networks, researchers often use mapping and clustering techniques in a combined fashion. Typically, however, mapping and clustering techniques that are used together rely on very different ideas and assumptions. We propose a unified approach to mapping and clustering of bibliometric networks. We show that the VOS mapping technique and a weighted and parameterized variant of modularity-based clustering can both be derived from the same underlying principle. We illustrate our proposed approach by producing a combined mapping and clustering of the most frequently cited publications that appeared in the field of information science in the period 1999-2008.

Connected through hyperedge HE-1 (induced by source paper "large publishing consortia produce higher citation impact research but co author contributions are hard to evaluate"):
  with members:
    - "granularity of algorithmically constructed publication level classifications of research publications identification of topics"
    - "the accuracy of confidence intervals for field normalised indicators"
    - "three practical field normalised alternative indicator formulae for research evaluation"
    - "is collaboration among scientists related to the citation impact of papers because their quality increases with collaboration an analysis based on data from f1000prime and normalized citation scores"
    - "an empirical analysis of the use of alphabetical authorship in scientific publishing"

Connected through hyperedge HE-2 (induced by source paper "visualizing the context of citations referencing papers published by eugene garfield a new type of keyword co occurrence analysis"):
  with members:
    - "citation based clustering of publications using citnetexplorer and vosviewer"
    - "citation analysis with microsoft academic"
    - "the coverage of microsoft academic analyzing the publication output of a university"
    - "the research space using the career paths of scholars to predict the evolution of the research output of individuals institutions and nations"
    - "a review of theory and practice in scientometrics"
    - "methods for the generation of normalized citation impact scores in bibliometrics which method best reflects the judgements of experts"
    - "measuring impact in research evaluations a thorough discussion of methods for effects of and problems with impact measurements"
    - "citation content analysis cca a framework for syntactic and semantic analysis of citation content"

Connected through hyperedge HE-3 (induced by source paper "bipartite graph analysis as an alternative to reveal clusterization in complex systems"):
  with members:
    - "ground truth concept based communities versus the external classification of physics manuscripts"
    - "sciencewise topic modeling over scientific literature networks"

Connected through hyperedge HE-4 (induced by source paper "mapping patent classifications portfolio and statistical analysis and the comparison of strengths and weaknesses"):
  with members:
    - "measuring technological distance for patent mapping"
    - "strategic intelligence on emerging technologies scientometric overlay mapping"
    - "generating clustered journal maps an automated system for hierarchical classification"
    - "patent portfolio analysis of cities statistics and maps of technological inventiveness"
    - "journal portfolio analysis for countries cities and organizations maps and comparisons"
    - "patents as instruments for exploring innovation dynamics geographic and technological perspectives on photovoltaic cells"
    - "can technology life cycles be indicated by diversity in patent classifications the crucial role of variety"
    - "science visualization and discursive knowledge"

Connected through hyperedge HE-5 (induced by source paper "citation based clustering of publications using citnetexplorer and vosviewer"):
  with members:
    - "which type of citation analysis generates the most accurate taxonomy of scientific and technical knowledge"
    - "clustering scientific publications based on citation relations a systematic comparison of different methods"
    - "citnetexplorer a new software tool for analyzing and visualizing citation networks"
    - "a new methodology for constructing a publication level classification system of science"
    - "text mining and visualization using vosviewer"

Connected through hyperedge HE-6 (induced by source paper "cooperative game theory approaches for network partitioning"):
  with members:
    - "community structure in large networks natural cluster sizes and the absence of large well defined clusters"
    - "a tutorial on spectral clustering"

Connected through hyperedge HE-7 (induced by source paper "construction of a pragmatic base line for journal classifications and maps based on aggregated journal journal citation relations"):
  with members:
    - "which type of citation analysis generates the most accurate taxonomy of scientific and technical knowledge"
    - "the dynamics of triads in aggregated journal journal citation relations specialty developments at the above journal level"
    - "journal portfolio analysis for countries cities and organizations maps and comparisons"
    - "large scale analysis of the accuracy of the journal classification systems of web of science and scopus"
    - "the operationalization of fields as wos subject categories wcs in evaluative bibliometrics the cases of library and information science and science technology studies"
    - "how to evaluate individual researchers working in the natural and life sciences meaningfully a proposal of methods based on percentiles of citations"
    - "citation analysis may severely underestimate the impact of clinical research as compared to basic research"
    - "interactive overlays of journals and the measurement of interdisciplinarity on the basis of aggregated journal journal citations"

Connected through hyperedge HE-8 (induced by source paper "generating clustered journal maps an automated system for hierarchical classification"):
  with members:
    - "which type of citation analysis generates the most accurate taxonomy of scientific and technical knowledge"
    - "construction of a pragmatic base line for journal classifications and maps based on aggregated journal journal citation relations"
    - "citations indicators of quality the impact fallacy"
    - "can hot spots in the sciences be mapped using the dynamics of aggregated journal journal citation relations"
    - "the operationalization of fields as wos subject categories wcs in evaluative bibliometrics the cases of library and information science and science technology studies"
    - "on the causes of subject specific citation rates in web of science"
    - "a new methodology for constructing a publication level classification system of science"
    - "measuring contextual citation impact of scientific journals"

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)