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: "google matrix and ulam networks of intermittency maps"
  Abstract: We study the properties of the Google matrix of an Ulam network generated by intermittency maps. This network is created by the Ulam method which gives a matrix approximant for the Perron-Frobenius operator of dynamical map. The spectral properties of eigenvalues and eigenvectors of this matrix are analyzed. We show that the PageRank of the system is characterized by a power law decay with the exponent $\ensuremath{\beta}$ dependent on map parameters and the Google damping factor $\ensuremath{\alpha}$. Under certain conditions the PageRank is completely delocalized so that the Google search in such a situation becomes inefficient.

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"
    - "pagerank of integers"
    - "universal emergence of pagerank"
    - "towards physical laws for software architecture"

Connected through hyperedge HE-2 (induced by source paper "google matrix of twitter"):
  with members:
    - "pagerank of integers"
    - "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 dynamical attractors and ulam networks"

Connected through hyperedge HE-3 (induced by source paper "google matrix of business process management"):
  with members:
    - "fractal weyl law for linux kernel architecture"
    - "towards physical laws for software architecture"
    - "two dimensional ranking of wikipedia articles"
    - "google matrix dynamical attractors and ulam networks"
    - "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-4 (induced by source paper "fractal weyl law for linux kernel architecture"):
  with members:
    - "towards physical laws for software architecture"
    - "google matrix dynamical attractors and ulam networks"
    - "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 "spectral properties of the google matrix of the world wide web and other directed networks"):
  with members:
    - "google matrix dynamical attractors and ulam networks"
    - "delocalization transition for the google matrix"

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)