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: "subexponential and fpt time inapproximability of independent set and related problems"
  Abstract: Fixed-parameter algorithms, approximation algorithms and moderately exponential algorithms are three major approaches to algorithms design. While each of them being very active in its own, there is an increasing attention to the connection between different approaches. In particular, whether Independent Set would be better approximable once endowed with subexponential-time or fpt-time is a central question. In this paper, we present a strong link between the linear PCP conjecture and the inapproximability, thus partially answering this question.

Connected through hyperedge HE-1 (induced by source paper "independent set induced matching and pricing connections and tight subexponential time approximation hardnesses"):
  with members:
    - "completely inapproximable monotone and antimonotone parameterized problems"
    - "on problems as hard as cnf sat"
    - "fixed parameter and approximation algorithms a new look"
    - "graph pricing problem on bounded treewidth bounded genus and k partite graphs"
    - "graph products revisited tight approximation hardness of induced matching poset dimension and more"
    - "algorithmic pricing via virtual valuations"
    - "exponential time approximation of hard problems"
    - "minimizing flow time in the wireless gathering problem"

Connected through hyperedge HE-2 (induced by source paper "fixed parameter inapproximability for clique and setcover in time super exponential in opt"):
  with members:
    - "fixed parameter and approximation algorithms a new look"
    - "independent set induced matching and pricing connections and tight subexponential time approximation hardnesses"
    - "conditional hardness for approximate coloring"

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)