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: "the query complexity of cake cutting"
  Abstract: We study the query complexity of cake cutting and give lower and upper bounds for computing approximately envy-free, perfect, and equitable allocations with the minimum number of cuts. The lower bounds are tight for computing connected envy-free allocations among n=3 players and for computing perfect and equitable allocations with minimum number of cuts between n=2 players. #R##N#We also formalize moving knife procedures and show that a large subclass of this family, which captures all the known moving knife procedures, can be simulated efficiently with arbitrarily small error in the Robertson-Webb query model.

Connected through hyperedge HE-1 (induced by source paper "contiguous cake cutting hardness results and approximation algorithms"):
  with members:
    - "fairly allocating contiguous blocks of indivisible items"
    - "fair and efficient cake division with connected pieces"
    - "connected fair allocation of indivisible goods"
    - "dividing a graphical cake"
    - "almost envy free allocations with connected bundles"
    - "pareto optimal allocation of indivisible goods with connectivity constraints"
    - "communication complexity of cake cutting"
    - "fair division of a graph"

Connected through hyperedge HE-2 (induced by source paper "fair division of mixed divisible and indivisible goods"):
  with members:
    - "efx exists for three agents"
    - "an improved approximation algorithm for maximin shares"
    - "monotonicity and competitive equilibrium in cake cutting"
    - "truthful fair division without free disposal"
    - "approximation algorithms for computing maximin share allocations"
    - "almost envy freeness with general valuations"
    - "a discrete and bounded envy free cake cutting protocol for any number of agents"
    - "a discrete and bounded envy free cake cutting protocol for four agents"

Connected through hyperedge HE-3 (induced by source paper "cake cutting explicit examples for impossibility results"):
  with members:
    - "don t cry to be the first symmetric fair division algorithms exist"
    - "existence of a simple and equitable fair division a short proof"
    - "resource monotonicity and population monotonicity in connected cake cutting"
    - "a discrete and bounded envy free cake cutting protocol for any number of agents"

Connected through hyperedge HE-4 (induced by source paper "don t cry to be the first symmetric fair division exist"):
  with members:
    - "cake cutting explicit examples for impossibility results"
    - "existence of a simple and equitable fair division a short proof"
    - "a discrete and bounded envy free cake cutting protocol for any number of agents"

Connected through hyperedge HE-5 (induced by source paper "don t cry to be the first symmetric fair division algorithms exist"):
  with members:
    - "existence of a simple and equitable fair division a short proof"

Connected through hyperedge HE-6 (induced by source paper "communication complexity of cake cutting"):
  with members:
    - "consensus halving is ppa complete"
    - "combinatorial auctions do need modest interaction"
    - "a discrete and bounded envy free cake cutting protocol for any number of agents"
    - "waste makes haste bounded time algorithms for envy free cake cutting with free disposal"
    - "hardness results for consensus halving"
    - "communication complexity for algorithm designers"
    - "welfare maximization with limited interaction"
    - "a stable marriage requires communication"

Connected through hyperedge HE-7 (induced by source paper "hardness results for consensus halving"):
  with members:
    - "consensus halving is ppa complete"
    - "inapproximability of nash equilibrium"
    - "the complexity of fairness through equilibrium"
    - "settling the complexity of computing two player nash equilibria"

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)