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 the multivariate gamma gamma distribution with arbitrary correlation and applications in wireless communications"
  Abstract: The statistical properties of the multivariate gamma–gamma    $(\Gamma\Gamma)$   distribution with arbitrary correlation have remained unknown. In this paper, we provide analytical expressions for the joint probability density function (pdf), cumulative distribution function (cdf), and moment generation function (mgf) of the multivariate    $\Gamma\Gamma$   distribution with arbitrary correlation. Furthermore, we present novel approximating expressions for the pdf and cdf of the sum of    $\Gamma\Gamma$   random variables (RVs) with arbitrary correlation. Based on this statistical analysis, we investigate the performance of radio frequency (RF) and optical wireless communication systems. It is worth noting that the presented expressions include several previous results in the literature as special cases.

Connected through hyperedge HE-1 (induced by source paper "on the distribution of the ratio of products of fisher snedecor mathcal f random variables and its applications"):
  with members:
    - "multiple antenna technologies for beyond 5g"
    - "the alpha kappa mu shadowed fading distribution statistical characterization and applications"
    - "mixed adc dac multipair massive mimo relaying systems performance analysis and power optimization"
    - "approximation to distribution of product of random variables using orthogonal polynomials for lognormal density"

Connected through hyperedge HE-2 (induced by source paper "distribution of the sum of fisher snedecor mathcal f random variables and its applications"):
  with members:
    - "on the statistics of the ratio of non constrained arbitrary alpha mu random variables a general framework and applications"
    - "rician k factor based analysis of xlos service probability in 5g outdoor ultra dense networks"
    - "on the ergodic capacity of mimo free space optical systems over turbulence channels"
    - "analysis of energy efficiency in fading channels under qos constraints"

Connected through hyperedge HE-3 (induced by source paper "unified framework for the effective rate analysis of wireless communication systems over miso fading channels"):
  with members:
    - "effective rate analysis of miso systems over alpha mu fading channels"
    - "a novel unified expression for the capacity and bit error probability of wireless communication systems over generalized fading channels"
    - "effective capacity of two hop wireless communication systems"
    - "a unified mgf based capacity analysis of diversity combiners over generalized fading channels"
    - "mimo wireless communications under statistical queueing constraints"
    - "effective capacity analysis of cognitive radio channels for quality of service provisioning"

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)