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: "a short proof of correctness of the quasi polynomial time algorithm for parity games"
  Abstract: Recently Cristian S. Calude, Sanjay Jain, Bakhadyr Khoussainov, Wei Li and Frank Stephan proposed a quasi-polynomial time algorithm for parity games. This paper proposes a short proof of correctness of their algorithm.

Connected through hyperedge HE-1 (induced by source paper "parity games zielonka s algorithm in quasi polynomial time"):
  with members:
    - "oink an implementation and evaluation of modern parity game solvers"
    - "universal trees grow inside separating automata quasi polynomial lower bounds for parity games"
    - "robust exponential worst cases for divide et impera algorithms for parity games"
    - "efficient parallel strategy improvement for parity games"
    - "an ordered approach to solving parity games in quasi polynomial time and quasi linear space"
    - "exponential lower bounds for policy iteration"

Connected through hyperedge HE-2 (induced by source paper "parity games another view on lehtinen s algorithm"):
  with members:
    - "universal trees grow inside separating automata quasi polynomial lower bounds for parity games"
    - "an ordered approach to solving parity games in quasi polynomial time and quasi linear space"
    - "playing pushdown parity games in a hurry"
    - "exponential lower bounds for policy iteration"

Connected through hyperedge HE-3 (induced by source paper "parity games and universal graphs"):
  with members:
    - "an optimal value iteration algorithm for parity games"
    - "universal trees grow inside separating automata quasi polynomial lower bounds for parity games"
    - "an ordered approach to solving parity games in quasi polynomial time and quasi linear space"
    - "succinct progress measures for solving parity games"

Connected through hyperedge HE-4 (induced by source paper "succinct progress measures for solving parity games"):
  with members:
    - "an ordered approach to solving parity games in quasi polynomial time and quasi linear space"
    - "new deterministic algorithms for solving parity games"
    - "improved algorithms for one pair and k pair streett objectives"

Connected through hyperedge HE-5 (induced by source paper "improved set based symbolic algorithms for parity games"):
  with members:
    - "winning cores in parity games"
    - "improved algorithms for one pair and k pair streett objectives"

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.FL(Formal Languages and Automata Theory)