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 monotonicity of the generalized marcum and nuttall q functions"
  Abstract: Monotonicity criteria are established for the generalized Marcum Q -function, QM(alpha,beta), the standard Nuttall Q-function, QM,N(alpha,beta) , and the normalized Nuttall Q-function, QM,N(alpha,beta), with respect to their real order indices M,N. Besides, closed-form expressions are derived for the computation of the standard and normalized Nuttall Q-functions for the case when M,N are odd multiples of 0.5 and M ges N. By exploiting these results, novel upper and lower bounds for QM,N(alpha,beta) and QM,N(alpha,beta) are proposed. Furthermore, specific tight upper and lower bounds for QM(alpha,beta), previously reported in the literature, are extended for real values of M. The offered theoretical results can be efficiently applied in the study of digital communications over fading channels, in the information-theoretic analysis of multiple-input multiple-output systems and in the description of stochastic processes in probability theory, among others.

Connected through hyperedge HE-1 (induced by source paper "wireless key generation from imperfect channel state information performance analysis and improvements"):
  with members:
    - "spectral and energy efficient wireless powered iot networks noma or tdma"

Connected through hyperedge HE-2 (induced by source paper "distributed spatial multiplexing systems with hardware impairments and imperfect channel estimation under rank 1 rician fading channels"):
  with members:
    - "an overview of signal processing techniques for millimeter wave mimo systems"
    - "exact sf zf analysis and computer algebra aided evaluation in rank 1 los rician fading"
    - "achievable rate of rician large scale mimo channels with transceiver hardware impairments"
    - "eigenvalue dynamics of a central wishart matrix with application to mimo systems"
    - "power scaling of uplink massive mimo systems with arbitrary rank channel means"
    - "directional cell discovery in millimeter wave cellular networks"
    - "channel estimation and hybrid precoding for millimeter wave cellular systems"
    - "massive mimo systems with non ideal hardware energy efficiency estimation and capacity limits"

Connected through hyperedge HE-3 (induced by source paper "analytic solutions to a marcum q function based integral and application in energy detection of unknown signals over multipath fading channels"):
  with members:
    - "analytic performance evaluation of underlay relay cognitive networks with channel estimation errors"
    - "analytic expressions and bounds for special functions and applications in communication theory"

Connected through hyperedge HE-4 (induced by source paper "analytic expressions and bounds for special functions and applications in communication theory"):
  with members:
    - "the area under a receiver operating characteristic curve over enriched multipath fading conditions"
    - "on the bivariate nakagami m cumulative distribution function closed form expression and applications"
    - "an approximation of the first order marcum q function with application to network connectivity analysis"
    - "on the monotonicity log concavity and tight bounds of the generalized marcum and nuttall q functions"

Connected through hyperedge HE-5 (induced by source paper "on the monotonicity log concavity and tight bounds of the generalized marcum and nuttall q functions"):
  with members:
    - "mimo multichannel beamforming ser and outage using new eigenvalue distributions of complex noncentral wishart matrices"

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)