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: "courcelle s theorem a game theoretic approach"
  Abstract: Courcelle's Theorem states that every problem definable in Monadic Second-Order logic can be solved in linear time on structures of bounded treewidth, for example, by constructing a tree automaton that recognizes or rejects a tree decomposition of the structure. Existing, optimized software like the MONA tool can be used to build the corresponding tree automata, which for bounded treewidth are of constant size. Unfortunately, the constants involved can become extremely large - every quantifier alternation requires a power set construction for the automaton. Here, the required space can become a problem in practical applications. #R##N#In this paper, we present a novel, direct approach based on model checking games, which avoids the expensive power set construction. Experiments with an implementation are promising, and we can solve problems on graphs where the automata-theoretic approach fails in practice.

Connected through hyperedge HE-1 (induced by source paper "positive instance driven dynamic programming for graph searching"):
  with members:
    - "a parameterized strongly polynomial algorithm for block structured integer programs"
    - "faster algorithms for integer programs with block structure"
    - "practical access to dynamic programming on tree decompositions"
    - "the complexity landscape of decompositional parameters for ilp"
    - "small resolution proofs for qbf using dependency treewidth"
    - "positive instance driven dynamic programming for treewidth"
    - "a differential approach to inference in bayesian networks"

Connected through hyperedge HE-2 (induced by source paper "model checking on ordered structures"):
  with members:
    - "order invariance on decomposable structures"
    - "successor invariant first order logic on graphs with excluded topological subgraphs"
    - "lower bounds for approximation schemes for closest string"
    - "model checking existential logic on partially ordered sets"
    - "deciding first order properties of nowhere dense graphs"
    - "lower bounds for the complexity of monadic second order logic"
    - "deciding first order properties of locally tree decomposable structures"

Connected through hyperedge HE-3 (induced by source paper "practical access to dynamic programming on tree decompositions"):
  with members:
    - "positive instance driven dynamic programming for treewidth"

Connected through hyperedge HE-4 (induced by source paper "simplified algorithmic metatheorems beyond mso treewidth and neighborhood diversity"):
  with members:
    - "parameterized complexity of fair deletion problems"
    - "the graph motif problem parameterized by the structure of the input graph"
    - "on the parameterized complexity of recognizing well covered r l graphs"
    - "algorithms and hardness results for happy coloring problems"
    - "anti path cover on sparse graph classes"
    - "target set selection in dense graph classes"
    - "extension complexity mso logic and treewidth"
    - "on the parameterized complexity of computing balanced partitions in graphs"

Connected through hyperedge HE-5 (induced by source paper "extension complexity mso logic and treewidth"):
  with members:
    - "extended formulation for csp that is compact for instances of bounded treewidth"
    - "lower bounds on the size of semidefinite programming relaxations"
    - "approximation limits of linear programs beyond hierarchies"
    - "algorithmic meta theorems"
    - "monadic datalog over finite structures with bounded treewidth"

Connected through hyperedge HE-6 (induced by source paper "kernelizing mso properties of trees of fixed height and some consequences"):
  with members:
    - "model checking lower bounds for simple graphs"
    - "using neighborhood diversity to solve hard problems"
    - "linear time algorithms for graphs of bounded rankwidth a fresh look using game theory"
    - "algorithmic meta theorems"

Connected through hyperedge HE-7 (induced by source paper "fly automata for checking mso 2 graph properties"):
  with members:
    - "fly automata model checking and recognizability"
    - "computations by fly automata beyond monadic second order logic"

Connected through hyperedge HE-8 (induced by source paper "fly automata model checking and recognizability"):
  with members:
    - "computations by fly automata beyond monadic second order logic"

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.DS(Data Structures and Algorithms)