human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "efx exists for three agents"):
  Abstract: We study the problem of allocating a set of indivisible items among agents with additive valuations in a fair manner. Envy-freeness up to any item (EFX) is arguably the most compelling fairness concept for this problem. However, despite significant efforts by many researchers for several years, its existence has not been settled beyond the simple case of two agents. In this paper, we break this barrier by showing that an EFX allocation always exists for three agents! Our proof is algorithmic and quite involved. Furthermore, we also falsify a conjecture of Caragiannis et al. by showing an instance with three agents for which there is a partial EFX allocation (some items are not allocated) with higher Nash welfare than that of any complete EFX allocation.

Includes members:
  Member "envy freeness up to any item with high nash welfare the virtue of donating items":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "maximum nash welfare and other stories about efx")
  Member "approximating nash social welfare under submodular valuations through un matchings":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "maximum nash welfare and other stories about efx")
  Member "a little charity guarantees almost envy freeness":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "fair and truthful mechanisms for dichotomous valuations")
  Member "an improved approximation algorithm for maximin shares":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "maximin fairness with mixed divisible and indivisible goods")
  Member "on fair division of indivisible items":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "envy freeness up to any item with high nash welfare the virtue of donating items")
  Member "almost envy freeness with general valuations":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "equitable allocations of indivisible chores")
  Member "approximating the nash social welfare with budget additive valuations":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "envy freeness up to any item with high nash welfare the virtue of donating items")
  Member "finding fair and efficient allocations":
    also connected through other hyperedges:
      - Hyperedge HE-8 (induced by source paper "maximum nash welfare and other stories about efx")

Question: Please tell me which class the source paper 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)