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: "proportionally representative participatory budgeting axioms and algorithms"
  Abstract: Participatory budgeting is one of the exciting developments in deliberative grassroots democracy. We concentrate on approval elections and propose proportional representation axioms in participatory budgeting, by generalizing relevant axioms for approval-based multi-winner elections. We observe a rich landscape with respect to the computational complexity of identifying proportional budgets and computing such, and present budgeting methods that satisfy these axioms by identifying budgets that are representative to the demands of vast segments of the voters.

Connected through hyperedge HE-1 (induced by source paper "participatory budgeting models and approaches"):
  with members:
    - "truthful aggregation of budget proposals"
    - "markets for public decision making"
    - "fair allocation of indivisible public goods"
    - "fair mixing the case of dichotomous preferences"
    - "iterative local voting for collective decision making in continuous spaces"
    - "the impossibility of extending random dictatorship to weak preferences"
    - "the core of the participatory budgeting problem"
    - "justified representation in approval based committee voting"

Connected through hyperedge HE-2 (induced by source paper "developments in multi agent fair allocation"):
  with members:
    - "from matching with diversity constraints to matching with regional quotas"
    - "fair division with minimal sharing"
    - "fairly allocating many goods with few queries"
    - "fair knapsack"
    - "competitive division of a mixed manna"
    - "approximation algorithms for computing maximin share allocations"
    - "fair mixing the case of dichotomous preferences"
    - "democratic fair allocation of indivisible goods"

Connected through hyperedge HE-3 (induced by source paper "proportionally representative participatory budgeting with ordinal preferences"):
  with members:
    - "a framework for approval based budgeting methods"
    - "fair allocation of indivisible public goods"
    - "the condorcet principle for multiwinner elections from shortlisting to proportionality"
    - "fair mixing the case of dichotomous preferences"
    - "rank maximal equal contribution a probabilistic social choice function"
    - "the expanding approvals rule improving proportional representation and monotonicity"
    - "the core of the participatory budgeting problem"
    - "properties of multiwinner voting rules"

Connected through hyperedge HE-4 (induced by source paper "approximately stable committee selection"):
  with members:
    - "proportionally fair clustering"
    - "group fairness in committee selection"
    - "fair knapsack"
    - "fair allocation of indivisible public goods"
    - "the expanding approvals rule improving proportional representation and monotonicity"
    - "the core of the participatory budgeting problem"
    - "properties of multiwinner voting rules"
    - "an improved approximation for k median and positive correlation in budgeted optimization"

Connected through hyperedge HE-5 (induced by source paper "truthful aggregation of budget proposals"):
  with members:
    - "markets for public decision making"
    - "fair mixing the case of dichotomous preferences"
    - "iterative local voting for collective decision making in continuous spaces"
    - "the core of the participatory budgeting problem"
    - "strategyproof approximation mechanisms for location on networks"

Connected through hyperedge HE-6 (induced by source paper "reality aware social choice"):
  with members:
    - "aggregation over metric spaces proposing and voting in elections budgeting and legislation"
    - "incorporating reality into social choice"

Connected through hyperedge HE-7 (induced by source paper "aggregation over metric spaces proposing and voting in elections budgeting and legislation"):
  with members:
    - "on computing centroids according to the p norms of hamming distance vectors"
    - "point foundations of e democracy"
    - "incorporating reality into social choice"
    - "the complexity of multiwinner voting rules with variable number of winners"
    - "sequential deliberation for social choice"
    - "metric distortion of social choice rules lower bounds and fairness properties"
    - "the core of the participatory budgeting problem"
    - "iterative judgment aggregation"

Connected through hyperedge HE-8 (induced by source paper "a framework for approval based budgeting methods"):
  with members:
    - "fair allocation of indivisible public goods"
    - "consistent approval based multi winner rules"
    - "multiwinner analogues of plurality rule axiomatic and algorithmic perspectives"

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)