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: "crdsa crdsa and irsa stability and performance evaluation"
  Abstract: In the recent past, new enhancements based on the well established Aloha technique (CRDSA, CRDSA++, IRSA) have demonstrated the capability to reach higher throughput than traditional SA, in bursty traffic conditions and without any need of coordination among terminals. In this paper, retransmissions and related stability for these new techniques are discussed. A model is also formulated in order to provide a basis for the analysis of the stability and the performance both for finite and infinite users population. This model can be used as a framework for the design of such a communication system.

Connected through hyperedge HE-1 (induced by source paper "interference calculation in asynchronous random access protocols using diversity"):
  with members:
    - "random access in dvb rcs2 design and dynamic control for congestion avoidance"
    - "average power limitations in sliding window contention resolution diversity slotted aloha"
    - "on the stability of asynchronous random access schemes"
    - "enhanced contention resolution aloha ecra"

Connected through hyperedge HE-2 (induced by source paper "random access in dvb rcs2 design and dynamic control for congestion avoidance"):
  with members:
    - "random access congestion control in dvb rcs2 interactive satellite terminals"
    - "average power limitations in sliding window contention resolution diversity slotted aloha"

Connected through hyperedge HE-3 (induced by source paper "on the stability of asynchronous random access schemes"):
  with members:
    - "enhanced contention resolution aloha ecra"
    - "on the stability of contention resolution diversity slotted aloha crdsa"

Connected through hyperedge HE-4 (induced by source paper "average power limitations in sliding window contention resolution diversity slotted aloha"):
  with members:
    - "sliding window based contention resolution diversity slotted aloha"

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)