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: "parity games zielonka s algorithm in quasi polynomial time"
  Abstract: Calude, Jain, Khoussainov, Li, and Stephan (2017) proposed a quasi-polynomial-time algorithm solving parity games. After this breakthrough result, a few other quasi-polynomial-time algorithms were introduced; none of them is easy to understand. Moreover, it turns out that in practice they operate very slowly. On the other side there is the Zielonka's recursive algorithm, which is very simple, exponential in the worst case, and the fastest in practice. We combine these two approaches: we propose a small modification of the Zielonka's algorithm, which ensures that the running time is at most quasi-polynomial. In effect, we obtain a simple algorithm that solves parity games in quasi-polynomial time. We also hope that our algorithm, after further optimizations, can lead to an algorithm that shares the good performance of the Zielonka's algorithm on typical inputs, while reducing the worst-case complexity on difficult inputs.

Connected through hyperedge HE-1 (induced by source paper "a universal attractor decomposition algorithm for parity games"):
  with members:
    - "practical synthesis of reactive systems from ltl specifications via parity games"
    - "improving the complexity of parys recursive algorithm"
    - "alternating weak automata from universal trees"
    - "computing nested fixpoints in quasipolynomial time"
    - "fixpoint games on continuous lattices"
    - "quasipolynomial set based symbolic algorithms for parity games"
    - "oink an implementation and evaluation of modern parity game solvers"
    - "succinct progress measures for solving parity games"

Connected through hyperedge HE-2 (induced by source paper "the strahler number of a parity game"):
  with members:
    - "a universal attractor decomposition algorithm for parity games"
    - "parity games another view on lehtinen s algorithm"
    - "alternating weak automata from universal trees"
    - "computing nested fixpoints in quasipolynomial time"
    - "universal trees grow inside separating automata quasi polynomial lower bounds for parity games"
    - "succinct progress measures for solving parity games"
    - "exponential lower bounds for policy iteration"

Connected through hyperedge HE-3 (induced by source paper "computing nested fixpoints in quasipolynomial time"):
  with members:
    - "universal trees grow inside separating automata quasi polynomial lower bounds for parity games"
    - "succinct progress measures for solving parity games"
    - "monadic second order logic and bisimulation invariance for coalgebras"
    - "the fixpoint iteration algorithm for parity games"
    - "exptime tableaux for the coalgebraic mu calculus"
    - "completeness of flat coalgebraic fixpoint logics"

Connected through hyperedge HE-4 (induced by source paper "improving the complexity of parys recursive algorithm"):
  with members:
    - "universal trees grow inside separating automata quasi polynomial lower bounds for parity games"
    - "the complexity of mean payoff games using universal graphs"
    - "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-5 (induced by source paper "a parity game tale of two counters"):
  with members:
    - "simple fixpoint iteration to solve parity games"
    - "solving parity games using an automata based algorithm"
    - "oink an implementation and evaluation of modern parity game solvers"
    - "attracting tangles to solve parity games"
    - "robust exponential worst cases for divide et impera algorithms for parity games"
    - "efficient parallel strategy improvement for parity games"
    - "succinct progress measures for solving parity games"
    - "a delayed promotion policy for parity games"

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)