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: "pagerank of integers"
  Abstract: We build up a directed network tracing links from a given integer to its divisors and analyze the properties of the Google matrix of this network. The PageRank vector of this matrix is computed numerically and it is shown that its probability is inversely proportional to the PageRank index thus being similar to the Zipf law and the dependence established for the World Wide Web. The spectrum of the Google matrix of integers is characterized by a large gap and a relatively small number of nonzero eigenvalues. A simple semi-analytical expression for the PageRank of integers is derived that allows to find this vector for matrices of billion size. This network provides a new PageRank order of integers.

Connected through hyperedge HE-1 (induced by source paper "google matrix of bitcoin network"):
  with members:
    - "bitcoin transaction graph analysis"
    - "deanonymisation of clients in bitcoin p2p network"
    - "spectral properties of google matrix of wikipedia and other networks"
    - "universal emergence of pagerank"
    - "towards physical laws for software architecture"
    - "google matrix and ulam networks of intermittency maps"

Connected through hyperedge HE-2 (induced by source paper "pagerank beyond the web"):
  with members:
    - "interactions of cultures and top people of wikipedia from ranking of 24 language editions"
    - "towards physical laws for software architecture"
    - "two dimensional ranking of wikipedia articles"
    - "google matrix dynamical attractors and ulam networks"
    - "supervised random walks predicting and recommending links in social networks"
    - "a local spectral method for graphs with applications to improving graph partitions and exploring data graphs locally"
    - "co authorship networks in the digital library research community"

Connected through hyperedge HE-3 (induced by source paper "zipf s law and l levin s probability distributions"):
  with members:
    - "kolmogorov complexity and the asymptotic bound for error correcting codes"
    - "zipf s law and avoidance of excessive synonymy"
    - "software libraries and their reuse entropy kolmogorov complexity and zipf s law"

Connected through hyperedge HE-4 (induced by source paper "google matrix of twitter"):
  with members:
    - "toward two dimensional search engines"
    - "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)