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 dynamical attractors and ulam networks"
  Abstract: We study the properties of the Google matrix generated by a coarse-grained Perron-Frobenius operator of the Chirikov typical map with dissipation. The finite-size matrix approximant of this operator is constructed by the Ulam method. This method applied to the simple dynamical model generates directed Ulam networks with approximate scale-free scaling and characteristics being in certain features similar to those of the world wide web with approximate scale-free degree distributions as well as two characteristics similar to the web: a power-law decay in PageRank that mirrors the decay of PageRank on the world wide web and a sensitivity to the value $\ensuremath{\alpha}$ in PageRank. The simple dynamical attractors play here the role of popular websites with a strong concentration of PageRank. A variation in the Google parameter $\ensuremath{\alpha}$ or other parameters of the dynamical map can drive the PageRank of the Google matrix to a delocalized phase with a strange attractor where the Google search becomes inefficient.

Connected through hyperedge HE-1 (induced by source paper "heat kernel based community detection"):
  with members:
    - "flow based algorithms for local graph clustering"
    - "programming with personalized pagerank a locally groundable first order probabilistic logic"
    - "fast matrix computations for pairwise and columnwise commute times and katz scores"
    - "defining and evaluating network communities based on ground truth"
    - "implementing regularization implicitly via approximate eigenvector computation"
    - "fast incremental and personalized pagerank"
    - "layered label propagation a multiresolution coordinate free ordering for compressing social networks"
    - "community structure in large networks natural cluster sizes and the absence of large well defined clusters"

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"
    - "pagerank of integers"
    - "towards physical laws for software architecture"
    - "two dimensional ranking of wikipedia articles"
    - "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 "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 and ulam networks of intermittency maps"

Connected through hyperedge HE-4 (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 and ulam networks of intermittency maps"
    - "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 "fractal weyl law for linux kernel architecture"):
  with members:
    - "towards physical laws for software architecture"
    - "google matrix and ulam networks of intermittency maps"
    - "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-6 (induced by source paper "spectral properties of the google matrix of the world wide web and other directed networks"):
  with members:
    - "google matrix and ulam networks of intermittency maps"
    - "delocalization transition for the google matrix"

Connected through hyperedge HE-7 (induced by source paper "google matrix and ulam networks of intermittency maps"):
  with members:
    - "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)