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: "social network games with obligatory product selection"
  Abstract: Recently, Apt and Markakis introduced a model for product adoption in social networks with multiple products, where the agents, influenced by their neighbours, can adopt one out of several alternatives (products). To analyze these networks we introduce social network games in which product adoption is obligatory. We show that when the underlying graph is a simple cycle, there is a polynomial time algorithm allowing us to determine whether the game has a Nash equilibrium. In contrast, in the arbitrary case this problem is NP-complete. We also show that the problem of determining whether the game is weakly acyclic is co-NP hard. Using these games we analyze various types of paradoxes that can arise in the considered networks. One of them corresponds to the well-known Braess paradox in congestion games. In particular, we show that social networks exist with the property that by adding an additional product to a specific node, the choices of the nodes will unavoidably evolve in such a way that everybody is strictly worse off.

Connected through hyperedge HE-1 (induced by source paper "coordination games on directed graphs"):
  with members:
    - "a faster tableau for ctl"
    - "a faster tableau for ctl"
    - "graphical models for game theory"
    - "social network games"
    - "diffusion in social networks with competing products"

Connected through hyperedge HE-2 (induced by source paper "coordination games on graphs"):
  with members:
    - "existence of stability in hedonic coalition formation games"
    - "social network games"
    - "diffusion in social networks with competing products"
    - "stable partitions in additively separable hedonic games"
    - "optimal partitions in additively separable hedonic games"

Connected through hyperedge HE-3 (induced by source paper "paradoxes in social networks with multiple products"):
  with members:
    - "graphical models for game theory"
    - "choosing products in social networks"
    - "social networks with competing products"
    - "on the hardness of network design for bottleneck routing games"
    - "social network games"
    - "diffusion in social networks with competing products"
    - "competitive contagion in networks"

Connected through hyperedge HE-4 (induced by source paper "social network games"):
  with members:
    - "graphical models for game theory"
    - "paradoxes in social networks with multiple products"
    - "choosing products in social networks"
    - "a classification of weakly acyclic games"
    - "social networks with competing products"
    - "diffusion in social networks with competing products"

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)