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: "zielonka s recursive algorithm dull weak and solitaire games and tighter bounds"
  Abstract: Dull, weak and nested solitaire games are important classes of parity games, capturing, among others, alternation-free mu-calculus and ECTL* model checking problems. These classes can be solved in polynomial time using dedicated algorithms. We investigate the complexity of Zielonka's Recursive algorithm for solving these special games, showing that the algorithm runs in O(d (n + m)) on weak games, and, somewhat surprisingly, that it requires exponential time to solve dull games and (nested) solitaire games. For the latter classes, we provide a family of games G, allowing us to establish a lower bound of 2^(n/3). We show that an optimisation of Zielonka's algorithm permits solving games from all three classes in polynomial time. Moreover, we show that there is a family of (non-special) games M that permits us to establish a lower bound of 2^(n/3), improving on the previous lower bound for the algorithm.

Connected through hyperedge HE-1 (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"
    - "parity games zielonka s algorithm in quasi polynomial time"
    - "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"

Connected through hyperedge HE-2 (induced by source paper "oink an implementation and evaluation of modern parity game solvers"):
  with members:
    - "efficient parallel strategy improvement 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"
    - "a delayed promotion policy for parity games"
    - "improvement in small progress measures"
    - "generating and solving symbolic parity games"
    - "benchmarks for parity games"
    - "non oblivious strategy improvement"

Connected through hyperedge HE-3 (induced by source paper "a comparison of bdd based parity game solvers"):
  with members:
    - "solving parity games using an automata based algorithm"
    - "oink an implementation and evaluation of modern parity game solvers"
    - "an ordered approach to solving parity games in quasi polynomial time and quasi linear space"
    - "succinct progress measures for solving parity games"
    - "a delayed promotion policy for parity games"
    - "benchmarks for parity games"
    - "the fixpoint iteration algorithm for parity games"
    - "alpaga a tool for solving parity games with imperfect information"

Connected through hyperedge HE-4 (induced by source paper "improvement in small progress measures"):
  with members:
    - "symmetric strategy improvement"
    - "strategy derivation for small progress measures"
    - "non oblivious strategy improvement"

Connected through hyperedge HE-5 (induced by source paper "benchmarks for parity games"):
  with members:
    - "benchmarks for parity games extended version"
    - "a complete anytime algorithm for treewidth"
    - "an exponential lower bound for the latest deterministic strategy iteration algorithms"
    - "gist a solver for probabilistic games"
    - "a super polynomial lower bound for the parity game strategy improvement algorithm as we know it"

Connected through hyperedge HE-6 (induced by source paper "fatal attractors in parity games building blocks for partial solvers"):
  with members:
    - "an o n 2 time algorithm for alternating b uchi games"
    - "automatic verification of correspondences for security protocols"

Connected through hyperedge HE-7 (induced by source paper "strategy derivation for small progress measures"):
  with members:
    - "graph operations on parity games and polynomial time algorithms"
    - "non oblivious strategy improvement"

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.LO(Logic in Computer Science)