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: "cores of countably categorical structures"
  Abstract: A relational structure is a core, if all its endomorphisms are embeddings.#N#This notion is important for computational complexity classification of#N#constraint satisfaction problems. It is a fundamental fact that every finite#N#structure has a core, i.e., has an endomorphism such that the structure induced#N#by its image is a core; moreover, the core is unique up to isomorphism. Weprove#N#that every \omega -categorical structure has a core. Moreover, every#N#\omega-categorical structure is homomorphically equivalent to a model-complete#N#core, which is unique up to isomorphism, and which is finite or \omega#N#-categorical. We discuss consequences for constraint satisfaction with \omega#N#-categorical templates.

Connected through hyperedge HE-1 (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"
    - "a dichotomy theorem for nonuniform csps"
    - "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"

Connected through hyperedge HE-2 (induced by source paper "a universal algebraic proof of the complexity dichotomy for monotone monadic snp"):
  with members:
    - "a dichotomy theorem for nonuniform csps"
    - "the proof of csp dichotomy conjecture"
    - "rewritability in monadic disjunctive datalog mmsnp and expressive description logics"
    - "the algebraic dichotomy conjecture for infinite domain constraint satisfaction problems"
    - "equations in oligomorphic clones and the constraint satisfaction problem for omega categorical structures"
    - "complexity classification in infinite domain constraint satisfaction"
    - "absorbing subalgebras cyclic terms and the constraint satisfaction problem"
    - "universal structures and the logic of forbidden patterns"

Connected through hyperedge HE-3 (induced by source paper "finite relation algebras with normal representations"):
  with members:
    - "a universal algebraic proof of the complexity dichotomy for monotone monadic snp"
    - "a dichotomy theorem for nonuniform csps"
    - "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"
    - "the complexity of phylogeny constraint satisfaction problems"
    - "on the scope of the universal algebraic approach to constraint satisfaction"

Connected through hyperedge HE-4 (induced by source paper "distance constraint satisfaction problems"):
  with members:
    - "on the scope of the universal algebraic approach to constraint satisfaction"
    - "constraint satisfaction tractability from semi lattice operations on infinite sets"
    - "schaefer s theorem for graphs"
    - "linear logic based analysis of constraint handling rules with disjunction"
    - "adventures in time and space"

Connected through hyperedge HE-5 (induced by source paper "equations in oligomorphic clones and the constraint satisfaction problem for omega categorical structures"):
  with members:
    - "the algebraic dichotomy conjecture for infinite domain constraint satisfaction problems"
    - "a complexity dichotomy for poset constraint satisfaction"
    - "complexity classification in infinite domain constraint satisfaction"
    - "schaefer s theorem for graphs"

Connected through hyperedge HE-6 (induced by source paper "constraint satisfaction problems for reducts of homogeneous graphs"):
  with members:
    - "the complexity of phylogeny constraint satisfaction"
    - "complexity classification in infinite domain constraint satisfaction"
    - "schaefer s theorem for graphs"

Connected through hyperedge HE-7 (induced by source paper "the algebraic dichotomy conjecture for infinite domain constraint satisfaction problems"):
  with members:
    - "the complexity of phylogeny constraint satisfaction"
    - "complexity classification in infinite domain constraint satisfaction"
    - "absorbing subalgebras cyclic terms and the constraint satisfaction problem"

Connected through hyperedge HE-8 (induced by source paper "the complexity of phylogeny constraint satisfaction"):
  with members:
    - "the algebraic dichotomy conjecture for infinite domain constraint satisfaction problems"
    - "complexity classification in infinite domain constraint satisfaction"
    - "schaefer s theorem for graphs"

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)