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: "vertex cover problem parameterized above and below tight bounds"
  Abstract: We study the well-known Vertex Cover problem parameterized above and below tight bounds. We show that two of the parameterizations (both were suggested by Mahajan, Raman and Sikdar, J. Computer and System Sciences, 75(2):137--153, 2009) are fixed-parameter tractable and two other parameterizations are W[1]-hard (one of them is, in fact, W[2]-hard).

Connected through hyperedge HE-1 (induced by source paper "domination above r independence does sparseness help"):
  with members:
    - "neighborhood complexity and kernelization for nowhere dense classes of graphs"
    - "kernelization and sparseness the case of dominating set"
    - "faster parameterized algorithms using linear programming"
    - "testing first order properties for subclasses of sparse graphs"
    - "all ternary permutation constraint satisfaction problems parameterized above average have kernels with quadratic numbers of variables"
    - "solving max r sat above a tight lower bound"
    - "linear time algorithms for finding a dominating set of fixed size in degenerated graphs"
    - "polynomial time data reduction for dominating set"

Connected through hyperedge HE-2 (induced by source paper "going far from degeneracy"):
  with members:
    - "faster deterministic parameterized algorithm for k path"
    - "raising the bar for vertex cover fixed parameter tractability above a higher guarantee"
    - "a randomized algorithm for long directed cycle"
    - "polynomial kernels for lambda extendible properties parameterized above the poljak turz ik bound"
    - "faster parameterized algorithms using linear programming"
    - "narrow sieves for parameterized paths and packings"
    - "solving max r sat above a tight lower bound"

Connected through hyperedge HE-3 (induced by source paper "hamiltonicity below dirac s condition"):
  with members:
    - "finding detours is fixed parameter tractable"
    - "determinant sums for undirected hamiltonicity"
    - "a probabilistic approach to problems parameterized above or below tight bounds"
    - "solving max r sat above a tight lower bound"

Connected through hyperedge HE-4 (induced by source paper "rank vertex cover as a natural problem for algebraic compression"):
  with members:
    - "a randomized polynomial kernelization for vertex cover with a smaller parameter"
    - "raising the bar for vertex cover fixed parameter tractability above a higher guarantee"
    - "faster parameterized algorithms using linear programming"
    - "representative sets and irrelevant vertices new tools for kernelization"
    - "on multiway cut parameterized above lower bounds"

Connected through hyperedge HE-5 (induced by source paper "finding detours is fixed parameter tractable"):
  with members:
    - "improved bounds for the excluded grid theorem"
    - "mixing color coding related techniques"
    - "the directed grid theorem"
    - "polynomial bounds for the grid minor theorem"
    - "solving max r sat above a tight lower bound"

Connected through hyperedge HE-6 (induced by source paper "on multiway cut parameterized above lower bounds"):
  with members:
    - "large isolating cuts shrink the multiway cut"
    - "multicut is fpt"
    - "fixed parameter tractability of multicut parameterized by the size of the cutset"
    - "computing multiway cut within the given excess over the largest minimum isolating cut"
    - "all ternary permutation constraint satisfaction problems parameterized above average have kernels with quadratic numbers of variables"
    - "almost 2 sat is fixed parameter tractable"

Connected through hyperedge HE-7 (induced by source paper "note on maximal bisection above tight lower bound"):
  with members:
    - "betweenness parameterized above tight lower bound"
    - "a probabilistic approach to problems parameterized above or below tight bounds"
    - "solving max r sat above a tight lower bound"
    - "note on max lin 2 above average"
    - "kernel s for problems with no kernel on out trees with many leaves"
    - "fixed parameter complexity of minimum profile problems"
    - "the linear arrangement problem parameterized above guaranteed value"

Connected through hyperedge HE-8 (induced by source paper "all ternary permutation constraint satisfaction problems parameterized above average have kernels with quadratic numbers of variables"):
  with members:
    - "betweenness parameterized above tight lower bound"
    - "a probabilistic approach to problems parameterized above or below tight bounds"
    - "solving max r sat above a tight lower bound"
    - "note on max lin 2 above average"
    - "fixed parameter complexity of minimum profile problems"
    - "the linear arrangement problem parameterized above guaranteed value"

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)