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 stability region of a relay assisted multiple access scheme"
  Abstract: In this paper we study the impact of a relay node in a two-user network. We assume a random access collision channel model with erasures. In particular we obtain an inner and an outer bound for the stability region.

Connected through hyperedge HE-1 (induced by source paper "on buffer aided multiple access relay channel"):
  with members:
    - "relay assisted multiple access with full duplex multi packet reception"
    - "buffer aided relaying with adaptive link selection"

Connected through hyperedge HE-2 (induced by source paper "probabilistic cooperation of a full duplex relay in random access networks"):
  with members:
    - "relay assisted multiple access with full duplex multi packet reception"

Connected through hyperedge HE-3 (induced by source paper "relay assisted multiple access with full duplex multi packet reception"):
  with members:
    - "effect of energy harvesting on stable throughput in cooperative relay systems"
    - "stability and performance issues of a relay assisted multiple access scheme with mpr capabilities"
    - "half duplex or full duplex relaying a capacity analysis under self interference"
    - "network level cooperation in energy harvesting wireless networks"
    - "relay assisted multiple access with multi packet reception capability and simultaneous transmission and reception"
    - "cellular systems with full duplex compress and forward relaying and cooperative base stations"

Connected through hyperedge HE-4 (induced by source paper "network level performance evaluation of a two relay cooperative random access wireless system"):
  with members:
    - "polynomial complexity minimum time scheduling in a class of wireless networks"
    - "relay assisted multiple access with full duplex multi packet reception"
    - "stability and performance issues of a relay assisted multiple access scheme with mpr capabilities"
    - "network level cooperation in energy harvesting wireless networks"
    - "relay assisted multiple access with multi packet reception capability and simultaneous transmission and reception"

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)