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: "meditations on quantified constraint satisfaction"
  Abstract: The quantified constraint satisfaction problem (QCSP) is the problem of deciding, given a structure and a first-order prenex sentence whose quantifier-free part is the conjunction of atoms, whether or not the sentence holds on the structure. One obtains a family of problems by defining, for each structure B, the problem QCSP(B) to be the QCSP where the structure is fixed to be B. In this article, we offer a viewpoint on the research program of understanding the complexity of the problems QCSP(B) on finite structures. In particular, we propose and discuss a group of conjectures; throughout, we attempt to place the conjectures in relation to existing results and to emphasize open issues and potential research directions.

Connected through hyperedge HE-1 (induced by source paper "qcsp monsters and the demise of the chen conjecture"):
  with members:
    - "a dichotomy theorem for nonuniform csps"
    - "the proof of csp dichotomy conjecture"
    - "the complexity of quantified constraints using the algebraic formulation"
    - "the algebraic dichotomy conjecture for infinite domain constraint satisfaction problems"
    - "quantified constraints and containment problems"
    - "the complexity of general valued csps"
    - "from complexity to algebra and back digraph classes collapsibility and the pgp"
    - "on the complexity of the model checking problem"

Connected through hyperedge HE-2 (induced by source paper "evaluating qbf solvers quantifier alternations matter"):
  with members:
    - "on expansion and resolution in cegar based qbf solving"
    - "size cost and capacity a semantic technique for hard random qbfs"
    - "depqbf 6 0 a search based qbf solver beyond traditional qcdcl"
    - "the qbf gallery"
    - "proof complexity modulo the polynomial hierarchy understanding alternation as a source of hardness"
    - "clause term resolution and learning in the evaluation of quantified boolean formulas"

Connected through hyperedge HE-3 (induced by source paper "the proof of csp dichotomy conjecture"):
  with members:
    - "algebraic approach to promise constraint satisfaction"
    - "a modifiction of the csp algorithm for infinite languages"
    - "a dichotomy theorem for nonuniform csps"
    - "the complexity of quantified constraints using the algebraic formulation"
    - "weaker consistency notions for all the csps of bounded width"
    - "the algebraic dichotomy conjecture for infinite domain constraint satisfaction problems"
    - "an algebraic hardness criterion for surjective constraint satisfaction"
    - "complexity classification in infinite domain constraint satisfaction"

Connected through hyperedge HE-4 (induced by source paper "asking the metaquestions in constraint tractability"):
  with members:
    - "generic expression hardness results for primitive positive formula comparison"
    - "arc consistency and friends"
    - "peek arc consistency"

Connected through hyperedge HE-5 (induced by source paper "from complexity to algebra and back digraph classes collapsibility and the pgp"):
  with members:
    - "quantified constraints and containment problems"
    - "on the complexity of the model checking problem"
    - "containment equivalence and coreness from csp to qcsp and beyond"
    - "qcsp on partially reflexive forests"
    - "the complexity of positive first order logic without equality"
    - "the complexity of quantified constraint satisfaction collapsibility sink algebras and the three element case"

Connected through hyperedge HE-6 (induced by source paper "qcsp on partially reflexive cycles the wavy line of tractability"):
  with members:
    - "quantified constraints and containment problems"
    - "containment equivalence and coreness from csp to qcsp and beyond"
    - "qcsp on partially reflexive forests"
    - "the complexity of quantified constraint satisfaction collapsibility sink algebras and the three element case"

Connected through hyperedge HE-7 (induced by source paper "containment equivalence and coreness from csp to qcsp and beyond"):
  with members:
    - "quantified constraints and containment problems"
    - "qcsp on partially reflexive forests"

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.LO(Logic in Computer Science)