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: "a dichotomy theorem for nonuniform csps"
  Abstract: In this paper we prove the Dichotomy Conjecture on the complexity of nonuniform constraint satisfaction problems posed by Feder and Vardi.

Connected through hyperedge HE-1 (induced by source paper "when symmetries are not enough a hierarchy of hard constraint satisfaction problems"):
  with members:
    - "topology is relevant in the infinite domain dichotomy conjecture for constraint satisfaction problems"
    - "a universal algebraic proof of the complexity dichotomy for monotone monadic snp"
    - "constraint satisfaction problems for reducts of homogeneous graphs"
    - "the algebraic dichotomy conjecture for infinite domain constraint satisfaction problems"
    - "complexity hierarchies beyond elementary"
    - "a complexity dichotomy for poset constraint satisfaction"
    - "schaefer s theorem for graphs"

Connected through hyperedge HE-2 (induced by source paper "optimal polynomial time compression for boolean max csp"):
  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"
    - "sparsification upper and lower bounds for graph problems and not all equal sat"
    - "complexity of counting csp with complex weights"
    - "preprocessing of min ones problems a dichotomy"
    - "the approximability of max csp with fixed value constraints"

Connected through hyperedge HE-3 (induced by source paper "asnp a tame fragment of existential second order logic"):
  with members:
    - "a universal algebraic proof of the complexity dichotomy for monotone monadic snp"
    - "the algebraic dichotomy conjecture for infinite domain constraint satisfaction problems"
    - "ontology based data access a study through disjunctive datalog csp and mmsnp"
    - "complexity classification in infinite domain constraint satisfaction"
    - "universal structures and the logic of forbidden patterns"
    - "datalog and constraint satisfaction with infinite templates"

Connected through hyperedge HE-4 (induced by source paper "the power of the combined basic lp and affine relaxation for promise csps"):
  with members:
    - "dichotomy for symmetric boolean pcsps"
    - "an algorithmic blend of lps and ring equations for promise csps"
    - "algebraic approach to promise constraint satisfaction"

Connected through hyperedge HE-5 (induced by source paper "intermediate problems in modular circuits satisfiability"):
  with members:
    - "satisfiability in multi valued circuits"

Connected through hyperedge HE-6 (induced by source paper "testing unsatisfiability of constraint satisfaction problems via tensor products"):
  with members:
    - "the tractability of csp classes defined by forbidden patterns"

Connected through hyperedge HE-7 (induced by source paper "topology is relevant in a dichotomy conjecture for infinite domain constraint satisfaction problems"):
  with members:
    - "a universal algebraic proof of the complexity dichotomy for monotone monadic snp"
    - "algebraic approach to promise constraint satisfaction"
    - "the proof of csp dichotomy conjecture"
    - "constraint satisfaction problems for reducts of homogeneous graphs"
    - "the algebraic dichotomy conjecture for infinite domain constraint satisfaction problems"
    - "a complexity dichotomy for poset constraint satisfaction"
    - "equations in oligomorphic clones and the constraint satisfaction problem for omega categorical structures"
    - "the complexity of phylogeny constraint satisfaction problems"

Connected through hyperedge HE-8 (induced by source paper "the complexity of boolean surjective general valued csps"):
  with members:
    - "the proof of csp dichotomy conjecture"
    - "the complexity of finite valued csps"
    - "a galois connection for weighted relational clones of infinite size"
    - "algebraic properties of valued constraint satisfaction problem"
    - "the complexity of general valued csps"
    - "an algebraic hardness criterion for surjective constraint satisfaction"
    - "an algebraic theory of complexity for discrete optimization"
    - "on the approximation of submodular functions"

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)