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: "3 sat faster and simpler unique sat bounds for ppsz hold in general"
  Abstract: The PPSZ algorithm by Paturi, Pudl\'ak, Saks, and Zane [1998] is the fastest known algorithm for Unique k-SAT, where the input formula does not have more than one satisfying assignment. For k>=5 the same bounds hold for general k-SAT. We show that this is also the case for k=3,4, using a slightly modified PPSZ algorithm. We do the analysis by defining a cost for satisfiable CNF formulas, which we prove to decrease in each PPSZ step by a certain amount. This improves our previous best bounds with Moser and Scheder [2011] for 3-SAT to O(1.308^n) and for 4-SAT to O(1.469^n).

Connected through hyperedge HE-1 (induced by source paper "maximum clique in disk like intersection graphs"):
  with members:
    - "classifying convex bodies by their contact and intersection graphs"
    - "on pseudo disk hypergraphs"
    - "stabbing pairwise intersecting disks by four points"
    - "complexity of finding perfect bipartite matchings minimizing the number of intersecting edges"

Connected through hyperedge HE-2 (induced by source paper "simpler partial derandomization of ppsz for k sat"):
  with members:
    - "popular conjectures imply strong lower bounds for dynamic problems"

Connected through hyperedge HE-3 (induced by source paper "bridging between 0 1 and linear programming via random walks"):
  with members:
    - "an algorithmic blend of lps and ring equations for promise csps"
    - "which np hard sat and csp problems admit exponentially improved algorithms"
    - "0 1 integer linear programming with a linear number of constraints"

Connected through hyperedge HE-4 (induced by source paper "which np hard sat and csp problems admit exponentially improved algorithms"):
  with members:
    - "kernelization of constraint satisfaction problems a study through universal algebra"
    - "the proof of csp dichotomy conjecture"
    - "tight hardness for shortest cycles and paths in sparse graphs"
    - "time complexity of constraint satisfaction via universal algebra"
    - "on problems as hard as cnf sat"
    - "randomised enumeration of small witnesses using a decision oracle"
    - "exact algorithms via monotone local search"
    - "powers of tensors and fast matrix multiplication"

Connected through hyperedge HE-5 (induced by source paper "fine grained reductions from approximate counting to decision"):
  with members:
    - "edge estimation with independent set oracles"
    - "clustered integer 3sum via additive combinatorics"
    - "faster all pairs shortest paths via circuit complexity"
    - "exploiting independent subformulas a faster approximation scheme for k sat"
    - "the relative exponential time complexity of approximate counting satisfying assignments"
    - "a satisfiability algorithm for ac 0"
    - "an approximation algorithm for k sat"

Connected through hyperedge HE-6 (induced by source paper "chain generalization of covering code and deterministic algorithm for k sat"):
  with members:
    - "the curse and blessing of not all equal in k satisfiability"
    - "derandomizing hssw algorithm for 3 sat"

Connected through hyperedge HE-7 (induced by source paper "on the equivalence among problems of bounded width"):
  with members:
    - "exact algorithms for maximum independent set"
    - "on problems as hard as cnf sat"
    - "edit distance cannot be computed in strongly subquadratic time unless seth is false"
    - "solving connectivity problems parameterized by treewidth in single exponential time"
    - "determinant sums for undirected hamiltonicity"
    - "known algorithms on graphs of bounded treewidth are probably optimal"

Connected through hyperedge HE-8 (induced by source paper "exploiting independent subformulas a faster approximation scheme for k sat"):
  with members:
    - "a satisfiability algorithm for ac 0"
    - "derandomizing hssw algorithm for 3 sat"
    - "an approximation algorithm for k sat"

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.CC(Computational Complexity)