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: "playing with population protocols"
  Abstract: Population protocols have been introduced as a model of sensor networks consisting of very limited mobile agents with no control over their own movement: A collection of anonymous agents, modeled by finite automata, interact in pairs according to some rules. #R##N#Predicates on the initial configurations that can be computed by such protocols have been characterized under several hypotheses. #R##N#We discuss here whether and when the rules of interactions between agents can be seen as a game from game theory. We do so by discussing several basic protocols.

Connected through hyperedge HE-1 (induced by source paper "efficient self stabilizing leader election in population protocols"):
  with members:
    - "almost logarithmic time space optimal leader election in population protocols"
    - "hardness of computing and approximating predicates and functions with leaderless population protocols"
    - "population protocols with faulty interactions the impact of a leader"
    - "homonym population protocols"
    - "naming and counting in anonymous unknown dynamic networks"

Connected through hyperedge HE-2 (induced by source paper "asymetric pavlovian populations"):
  with members:
    - "distributed computing with adaptive heuristics"
    - "adversarial scheduling in evolutionary game dynamics"
    - "the computational power of population protocols"

Connected through hyperedge HE-3 (induced by source paper "passively mobile communicating machines that use restricted space"):
  with members:
    - "passively mobile communicating logarithmic space machines"
    - "on the convergence of population protocols when population goes to infinity"
    - "the dynamics of probabilistic population protocols"
    - "the computational power of population protocols"

Connected through hyperedge HE-4 (induced by source paper "passively mobile communicating logarithmic space machines"):
  with members:
    - "on the convergence of population protocols when population goes to infinity"
    - "the dynamics of probabilistic population protocols"
    - "the computational power of population protocols"

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.GT(Computer Science and Game Theory)