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: "coalitions in nonatomic network congestion games"
  Abstract: This work shows that the formation of a finite number of coalitions in a nonatomic network congestion game benefits everyone. At the equilibrium of the composite game played by coalitions and individuals, the average cost to each coalition and the individuals' common cost are all lower than in the corresponding nonatomic game (without coalitions). The individuals' cost is lower than the average cost to any coalition. Similarly, the average cost to a coalition is lower than that to any larger coalition. Whenever some members of a coalition become individuals, the individuals' payoff is increased. In the case of a unique coalition, both the average cost to the coalition and the individuals' cost are decreasing with respect to the size of the coalition. In a sequence of composite games, if a finite number of coalitions are fixed, while the size of the remaining coalitions goes to zero, the equilibria of these games converge to the equilibrium of a composite game played by the same fixed coalitions and the remaining individuals.

Connected through hyperedge HE-1 (induced by source paper "efficient estimation of equilibria in large aggregative games with coupling constraints"):
  with members:
    - "nash and wardrop equilibria in aggregative games with coupling constraints"
    - "parametrized nash equilibria in atomic splittable congestion games via weighted block laplacians"
    - "nonsmooth aggregative games with coupling constraints and infinitely many classes of players"
    - "routing game on parallel networks the convergence of atomic to nonatomic"

Connected through hyperedge HE-2 (induced by source paper "routing game on parallel networks the convergence of atomic to nonatomic"):
  with members:
    - "nash and wardrop equilibria in aggregative games with coupling constraints"
    - "nonsmooth aggregative games with coupling constraints and infinitely many classes of players"

Connected through hyperedge HE-3 (induced by source paper "nonsmooth aggregative games with coupling constraints and infinitely many classes of players"):
  with members:
    - "nash and wardrop equilibria in aggregative games with coupling constraints"

Connected through hyperedge HE-4 (induced by source paper "strategic decentralization in binary choice composite congestion games"):
  with members:
    - "worst case coalitions in routing games"
    - "the uniqueness property for networks with several origin destination pairs"

Connected through hyperedge HE-5 (induced by source paper "composite charging games in networks of electric vehicles"):
  with members:
    - "charging games in networks of electrical vehicles"
    - "noncooperative games for autonomous consumer load balancing over smart grid"

Connected through hyperedge HE-6 (induced by source paper "coalitions in routing games a worst case perspective"):
  with members:
    - "how good is bargained routing"
    - "the effect of malice on the social optimum in linear load balancing games"
    - "coalitional games for distributed collaborative spectrum sensing in cognitive radio networks"

Connected through hyperedge HE-7 (induced by source paper "worst case coalitions in routing games"):
  with members:
    - "the effect of malice on the social optimum in linear load balancing games"
    - "coalitional game theory for communication networks a tutorial"
    - "coalitional games for distributed collaborative spectrum sensing in cognitive radio networks"

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)