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: "toward two dimensional search engines"
  Abstract: We study the statistical properties of various directed networks using ranking of their nodes based on the dominant vectors of the Google matrix known as PageRank and CheiRank. On average PageRank orders nodes proportionally to a number of ingoing links, while CheiRank orders nodes proportionally to a number of outgoing links. In this way, the ranking of nodes becomes two dimensional which paves the way for the development of two-dimensional search engines of a new type. Statistical properties of information flow on the PageRank–CheiRank plane are analyzed for networks of British, French and Italian universities, Wikipedia, Linux Kernel, gene regulation and other networks. A special emphasis is done for British universities networks using the large database publicly available in the UK. Methods of spam links control are also analyzed.

Connected through hyperedge HE-1 (induced by source paper "novel version of pagerank cheirank and 2drank for wikipedia in multilingual network using social impact"):
  with members:
    - "world influence and interactions of universities from wikipedia networks"
    - "hoprank how semantic structure influences teleportation in pagerank a case study on bioportal"
    - "wikipedia traffic data and electoral prediction towards theoretically informed models"
    - "wikipedia ranking of world universities"
    - "interactions of cultures and top people of wikipedia from ranking of 24 language editions"
    - "spectral properties of google matrix of wikipedia and other networks"
    - "two dimensional ranking of wikipedia articles"

Connected through hyperedge HE-2 (induced by source paper "wikipedia ranking of world universities"):
  with members:
    - "interactions of cultures and top people of wikipedia from ranking of 24 language editions"
    - "on the internal dynamics of the shanghai ranking"
    - "highlighting entanglement of cultures via ranking of multilingual wikipedia articles"
    - "towards physical laws for software architecture"
    - "two dimensional ranking of wikipedia articles"

Connected through hyperedge HE-3 (induced by source paper "interactions of cultures and top people of wikipedia from ranking of 24 language editions"):
  with members:
    - "multilinguals and wikipedia editing"
    - "spectral properties of google matrix of wikipedia and other networks"
    - "highlighting entanglement of cultures via ranking of multilingual wikipedia articles"
    - "biographical social networks on wikipedia a cross cultural study of links that made history"
    - "towards physical laws for software architecture"
    - "two dimensional ranking of wikipedia articles"
    - "the tower of babel meets web 2 0 user generated content and its applications in a multilingual context"

Connected through hyperedge HE-4 (induced by source paper "spectral properties of google matrix of wikipedia and other networks"):
  with members:
    - "google matrix of twitter"
    - "fractal weyl law for linux kernel architecture"
    - "towards physical laws for software architecture"
    - "two dimensional ranking of wikipedia articles"
    - "spectral properties of the google matrix of the world wide web and other directed networks"
    - "delocalization transition for the google matrix"

Connected through hyperedge HE-5 (induced by source paper "highlighting entanglement of cultures via ranking of multilingual wikipedia articles"):
  with members:
    - "spectral properties of google matrix of wikipedia and other networks"
    - "biographical social networks on wikipedia a cross cultural study of links that made history"
    - "a practical approach to language complexity a wikipedia case study"
    - "there is no deadline time evolution of wikipedia discussions"
    - "towards physical laws for software architecture"
    - "two dimensional ranking of wikipedia articles"

Connected through hyperedge HE-6 (induced by source paper "google matrix of twitter"):
  with members:
    - "pagerank of integers"
    - "universal emergence of pagerank"
    - "fractal weyl law for linux kernel architecture"
    - "four degrees of separation"
    - "towards physical laws for software architecture"
    - "two dimensional ranking of wikipedia articles"
    - "google matrix and ulam networks of intermittency maps"
    - "google matrix dynamical attractors and ulam networks"

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.IR(Information Retrieval)