human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "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.

Includes members:
  Member "on the ergodic capacity of mimo free space optical systems over turbulence channels":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "distribution of the sum of fisher snedecor mathcal f random variables and its applications")
  Member "unified performance analysis of mixed radio frequency free space optical dual hop transmission systems":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "shadowed fso mmwave systems with interference")
  Member "statistical characterization of kappa mu shadowed fading":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "outage probability and rate for kappa mu shadowed fading in interference limited scenario")
  Member "on the distribution of the sum of gamma gamma variates and applications in rf and optical wireless communications":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "performance of two way relaying over α μ fading channels in hybrid rf fso wireless networks")

Question: Please tell me which class the source paper 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)