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: "an algebraic hardness criterion for surjective constraint satisfaction"
  Abstract: The constraint satisfaction problem (CSP) on a relational structure B is to decide, given a set of constraints on variables where the relations come from B, whether or not there is a assignment to the variables satisfying all of the constraints; the surjective CSP is the variant where one decides the existence of a surjective satisfying assignment onto the universe of B. We present an algebraic condition on the polymorphism clone of B and prove that it is sufficient for the hardness of the surjective CSP on a finite structure B, in the sense that this problem admits a reduction from a certain fixed-structure CSP. To our knowledge, this is the first result that allows one to use algebraic information from a relational structure B to infer information on the complexity hardness of surjective constraint satisfaction on B. A corollary of our result is that, on any finite non-trivial structure having only essentially unary polymorphisms, surjective constraint satisfaction is NP-complete.

Connected through hyperedge HE-1 (induced by source paper "the complexity of boolean surjective general valued csps"):
  with members:
    - "a dichotomy theorem for nonuniform csps"
    - "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 theory of complexity for discrete optimization"
    - "on the approximation of submodular functions"

Connected through hyperedge HE-2 (induced by source paper "the data complexity of ontology mediated queries with closed predicates"):
  with members:
    - "a dichotomy theorem for nonuniform csps"
    - "dichotomies in ontology mediated querying with the guarded fragment"
    - "the data complexity of description logic ontologies"
    - "inseparability and conservative extensions of description logic ontologies a survey"
    - "ontology based data access a study through disjunctive datalog csp and mmsnp"
    - "the complexity of surjective homomorphism problems a survey"
    - "the dl lite family and relations"

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"
    - "complexity classification in infinite domain constraint satisfaction"
    - "absorbing subalgebras cyclic terms and the constraint satisfaction problem"

Connected through hyperedge HE-4 (induced by source paper "surjective h colouring over reflexive digraphs"):
  with members:
    - "surjective h colouring new hardness results"
    - "a dichotomy theorem for nonuniform csps"
    - "the proof of csp dichotomy conjecture"
    - "the complexity of surjective homomorphism problems a survey"
    - "a characterisation of first order constraint satisfaction problems"

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)