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: "on spectrum and infrastructure sharing in multi operator cellular networks"
  Abstract: In this paper, we introduce a mathematical framework for analyzing and optimizing multi-operator cellular networks that are allowed to share spectrum licenses and infrastructure elements. The proposed approach exploits stochastic geometry for modeling the locations of cellular base stations and for computing the aggregate average rate. The trade-offs that emerge from sharing spectrum frequencies and cellular base stations are quantified and discussed.

Connected through hyperedge HE-1 (induced by source paper "inter operator infrastructure sharing trade offs and market"):
  with members:
    - "integral approximations for coverage probability"
    - "a tractable approach to coverage and rate in cellular networks"

Connected through hyperedge HE-2 (induced by source paper "infrastructure sharing for mobile network operators analysis of trade offs and market"):
  with members:
    - "on spectrum sharing among micro operators in 5g"
    - "inter operator infrastructure sharing trade offs and market"
    - "designing and implementing future aerial communication networks"
    - "integral approximations for coverage probability"
    - "soaran a service oriented architecture for radio access network sharing in evolving mobile networks"
    - "a tractable approach to coverage and rate in cellular networks"

Connected through hyperedge HE-3 (induced by source paper "radio access network and spectrum sharing in mobile networks a stochastic geometry perspective"):
  with members:
    - "a primer on cellular network analysis using stochastic geometry"
    - "resource sharing in 5g mmwave cellular networks"
    - "poisson hole process theory and applications to wireless networks"
    - "gains of restricted secondary licensing in millimeter wave cellular systems"
    - "co primary multi operator resource sharing for small cell networks"
    - "technical rate of substitution of spectrum in future mobile broadband provisioning"
    - "on the feasibility of sharing spectrum licenses in mmwave cellular systems"
    - "effect of los nlos propagation on area spectral efficiency and energy efficiency of small cells"

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.IT(Information Theory)