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 performance of approximate equilibria in congestion games"
  Abstract: We study the performance of approximate Nash equilibria for linear congestion games. We consider how much the price of anarchy worsens and how much the price of stability improves as a function of the approximation factor $\epsilon$. We give (almost) tight upper and lower bounds for both the price of anarchy and the price of stability for atomic and non-atomic congestion games. Our results not only encompass and generalize the existing results of exact equilibria to $\epsilon$-Nash equilibria, but they also provide a unified approach which reveals the common threads of the atomic and non-atomic price of anarchy results. By expanding the spectrum, we also cast the existing results in a new light. For example, the Pigou network, which gives tight results for exact Nash equilibria of selfish routing, remains tight for the price of stability of $\epsilon$-Nash equilibria but not for the price of anarchy.

Connected through hyperedge HE-1 (induced by source paper "existence and complexity of approximate equilibria in weighted congestion games"):
  with members:
    - "on approximate pure nash equilibria in weighted congestion games with polynomial latencies"
    - "an improved algorithm for computing approximate equilibria in weighted congestion games"
    - "the price of stability of weighted congestion games"
    - "computing approximate pure nash equilibria in shapley value weighted congestion games"
    - "efficient computation of approximate pure nash equilibria in congestion games"
    - "approximate pure nash equilibria in weighted congestion games existence efficient computation and structure"

Connected through hyperedge HE-2 (induced by source paper "on the price of satisficing in network user equilibria"):
  with members:
    - "sensitivity of wardrop equilibria revisited"
    - "how bad is selfish routing in practice"
    - "the impact of worst case deviations in non atomic network routing games"
    - "the burden of risk aversion in mean risk selfish routing"

Connected through hyperedge HE-3 (induced by source paper "an improved algorithm for computing approximate equilibria in weighted congestion games"):
  with members:
    - "the price of stability of weighted congestion games"
    - "computing approximate pure nash equilibria in shapley value weighted congestion games"
    - "efficient computation of approximate pure nash equilibria in congestion games"
    - "approximate pure nash equilibria in weighted congestion games existence efficient computation and structure"
    - "a unifying tool for bounding the quality of non cooperative solutions in weighted congestion games"

Connected through hyperedge HE-4 (induced by source paper "the price of stability of weighted congestion games"):
  with members:
    - "computing approximate pure nash equilibria in shapley value weighted congestion games"
    - "efficient computation of approximate pure nash equilibria in congestion games"
    - "approximate pure nash equilibria in weighted congestion games existence efficient computation and structure"
    - "a unifying tool for bounding the quality of non cooperative solutions in weighted congestion games"

Connected through hyperedge HE-5 (induced by source paper "path deviations outperform approximate stability in heterogeneous congestion games"):
  with members:
    - "the impact of worst case deviations in non atomic network routing games"
    - "matroids are immune to braess paradox"
    - "asymptotically tight bounds for inefficiency in risk averse selfish routing"
    - "the burden of risk aversion in mean risk selfish routing"

Connected through hyperedge HE-6 (induced by source paper "congestion games with complementarities"):
  with members:
    - "congestion games with mixed objectives"
    - "short sequences of improvement moves lead to approximate equilibria in constraint satisfaction games"
    - "efficient computation of approximate pure nash equilibria in congestion games"
    - "approximate pure nash equilibria in weighted congestion games existence efficient computation and structure"

Connected through hyperedge HE-7 (induced by source paper "reconciling selfish routing with social good"):
  with members:
    - "informational braess paradox the effect of information on traffic congestion"
    - "mechanism design in large games incentives and privacy"
    - "approximate pure nash equilibria in weighted congestion games existence efficient computation and structure"

Connected through hyperedge HE-8 (induced by source paper "tight inefficiency bounds for perception parameterized affine congestion games"):
  with members:
    - "congestion games with distance based strict uncertainty"
    - "playing the wrong game smoothness bounds for congestion games with behavioral biases"

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)