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: "almost envy freeness in group resource allocation"
  Abstract: We study the problem of fairly allocating indivisible goods between groups of agents using the recently introduced relaxations of envy-freeness. We consider the existence of fair allocations under different assumptions on the valuations of the agents. In particular, our results cover cases of arbitrary monotonic, responsive, and additive valuations, while for the case of binary valuations we fully characterize the cardinalities of two groups of agents for which a fair allocation can be guaranteed with respect to both envy-freeness up to one good (EF1) and envy-freeness up to any good (EFX). Moreover, we introduce a new model where the agents are not partitioned into groups in advance, but instead the partition can be chosen in conjunction with the allocation of the goods. In this model, we show that for agents with arbitrary monotonic valuations, there is always a partition of the agents into two groups of any given sizes along with an EF1 allocation of the goods. We also provide an extension of this result to any number of groups.

Connected through hyperedge HE-1 (induced by source paper "maximum nash welfare and other stories about efx"):
  with members:
    - "envy freeness up to any item with high nash welfare the virtue of donating items"
    - "approximating nash social welfare under submodular valuations through un matchings"
    - "maximin aware allocations of indivisible goods"
    - "greedy algorithms for fair division of mixed manna"
    - "an improved approximation algorithm for maximin shares"
    - "greedy algorithms for maximizing nash social welfare"
    - "groupwise maximin fair allocation of indivisible goods"
    - "approximation algorithms for computing maximin share allocations"

Connected through hyperedge HE-2 (induced by source paper "almost group envy free allocation of indivisible goods and chores"):
  with members:
    - "fair allocation of combinations of indivisible goods and chores"
    - "fair allocation of indivisible public goods"
    - "greedy algorithms for maximizing nash social welfare"
    - "competitive division of a mixed manna"
    - "almost envy freeness with general valuations"
    - "democratic fair allocation of indivisible goods"
    - "fair assignment of indivisible objects under ordinal preferences"

Connected through hyperedge HE-3 (induced by source paper "fairly allocating contiguous blocks of indivisible items"):
  with members:
    - "fair division of a graph"
    - "asymptotic existence of proportionally fair allocations"
    - "computing socially efficient cake divisions"

Connected through hyperedge HE-4 (induced by source paper "democratic fair allocation of indivisible goods"):
  with members:
    - "fairly allocating contiguous blocks of indivisible items"
    - "connected fair allocation of indivisible goods"
    - "computing a small agreeable set of indivisible items"
    - "comparing approximate relaxations of envy freeness"
    - "fair allocation of combinations of indivisible goods and chores"
    - "almost envy free allocations with connected bundles"
    - "lecture notes on fair division"
    - "competitive equilibria with indivisible goods and generic budgets"

Connected through hyperedge HE-5 (induced by source paper "fair cake cutting among families"):
  with members:
    - "monotonicity and competitive equilibrium in cake cutting"
    - "the complexity of cake cutting with unequal shares"
    - "competitive division of a mixed manna"
    - "approximate maximin shares for groups of agents"
    - "fair and square cake cutting in two dimensions"
    - "resource monotonicity and population monotonicity in connected cake cutting"
    - "democratic fair allocation of indivisible goods"

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)