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: "outage analysis of spectrum sharing energy harvesting cognitive relays in nakagami m channels"
  Abstract: Energy harvesting (EH) cognitive relays are an exciting solution to the problem of inefficient use of spectrum while achieving green communications and spatial diversity. In a spectrum sharing scenario, we investigate the performance of a cognitive relay network, where a secondary source communicates with its destination over Nakagami-$m$ channels via decode-and-forward EH relays while maintaining the outage probability of the primary user below a predefined threshold. Specifically, we derive a closed-form expression for the secondary outage probability and show that it is a function of the probability of an EH relay having sufficient energy for relaying, which in turn, depends on the energy harvesting and consumption rates of the EH relay and the primary outage probability threshold. We also show that relaxing the primary outage constraint may not always benefit the cognitive EH relay network due to the limitations imposed on the relay's transmit power by the energy constraint.

Connected through hyperedge HE-1 (induced by source paper "outage analysis for swipt enabled two way cognitive cooperative communications"):
  with members:
    - "wireless information and power transfer architecture design and rate energy tradeoff"

Connected through hyperedge HE-2 (induced by source paper "interference aided energy harvesting cognitive relaying with multiple primary transceivers"):
  with members:
    - "rf based energy harvesting in decode and forward relaying systems ergodic and outage capacities"
    - "wireless energy harvesting in a cognitive relay network"
    - "wireless powered relays in cooperative communications time switching relaying protocols and throughput analysis"
    - "optimal time sharing in underlay cognitive radio systems with rf energy harvesting"
    - "distributed power splitting for swipt in relay interference channels using game theory"
    - "wireless powered communications performance analysis and optimization"
    - "interference assisted wireless energy harvesting in cognitive relay network with multiple primary transceivers"
    - "harvest then cooperate wireless powered cooperative communications"

Connected through hyperedge HE-3 (induced by source paper "online time sharing policy in energy harvesting cognitive radio network with channel uncertainty"):
  with members:
    - "end to end throughput maximization for underlay multi hop cognitive radio networks with rf energy harvesting"
    - "on optimal offline time sharing policy for energy harvesting underlay cognitive radio"
    - "optimal time sharing in underlay cognitive radio systems with rf energy harvesting"
    - "wireless networks with rf energy harvesting a contemporary survey"
    - "on green energy powered cognitive radio networks"
    - "a learning theoretic approach to energy harvesting communication system optimization"
    - "optimal utilization of a cognitive shared channel with a rechargeable primary source node"

Connected through hyperedge HE-4 (induced by source paper "interference assisted wireless energy harvesting in cognitive relay network with multiple primary transceivers"):
  with members:
    - "wireless powered relays in cooperative communications time switching relaying protocols and throughput analysis"
    - "distributed power splitting for swipt in relay interference channels using game theory"
    - "harvest then cooperate wireless powered cooperative communications"
    - "information and energy cooperation in cognitive radio networks"
    - "energy harvesting cognitive radio with channel aware sensing strategy"
    - "wireless networks with rf energy harvesting a contemporary survey"
    - "power allocation strategies in energy harvesting wireless cooperative networks"
    - "on spectrum sharing between energy harvesting cognitive radio users and primary users"

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)