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: "simulations and bisimulations for coalgebraic modal logics"
  Abstract: We define a notion of Lambda-simulation for coalgebraic modal logics, parametric on the choice Lambda of predicate liftings for a functor T. We show this notion is adequate in several ways: i) it preserves truth of positive formulas, ii) for Lambda a separating set of monotone predicate liftings, the associated notion of Lambda-bisimulation corresponds to T-behavioural equivalence (moreover Lambda-n-bisimulations correspond to T-n-behavioural equivalence), and iii) in fact, for Lambda-separating and T preserving weak pullbacks, difunctional Lambda-bisimulations are T-bisimulations. In essence, we arrive at a modular notion of equivalence that, when used with a separating set of monotone predicate liftings, coincides with T-behavioural equivalence regardless of whether T preserves weak pullbacks (unlike the notion of T-bisimilarity).

Connected through hyperedge HE-1 (induced by source paper "explaining non bisimilarity in a coalgebraic approach games and distinguishing formulas"):
  with members:
    - "codensity games for bisimilarity"
    - "predicate liftings and functor presentations in coalgebraic expression languages"
    - "efficient coalgebraic partition refinement"
    - "games for bisimulations and abstraction"
    - "metric bisimulation games and real valued modal logics for coalgebras"

Connected through hyperedge HE-2 (induced by source paper "model comparison games for horn description logics"):
  with members:
    - "query inseparability for alc ontologies"
    - "a van benthem theorem for fuzzy modal logic"
    - "learning first order definable concepts over structures of small degree"
    - "dichotomies in ontology mediated querying with the guarded fragment"
    - "the data complexity of description logic ontologies"
    - "the complexity of reverse engineering problems for conjunctive queries"
    - "on the expressive power of sub propositional fragments of modal logic"
    - "querying the guarded fragment"

Connected through hyperedge HE-3 (induced by source paper "predicate liftings and functor presentations in coalgebraic expression languages"):
  with members:
    - "towards a coalgebraic chomsky hierarchy"
    - "subsumption checking in conjunctive coalgebraic fixpoint logics"
    - "generalizing determinization from automata to coalgebras"
    - "exptime tableaux for the coalgebraic mu calculus"
    - "non deterministic kleene coalgebras"
    - "completeness of flat coalgebraic fixpoint logics"

Connected through hyperedge HE-4 (induced by source paper "bisimulations for coalgebras on stone spaces"):
  with members:
    - "generalized powerlocales via relation lifting"
    - "relating coalgebraic notions of bisimulation"
    - "neighbourhood structures bisimilarity and basic model theory"

Connected through hyperedge HE-5 (induced by source paper "bisimulation games on coalgebras"):
  with members:
    - "a van benthem theorem for fuzzy modal logic"
    - "logical characterization of bisimulation metrics"
    - "behavioral metrics via functor lifting"
    - "relating coalgebraic notions of bisimulation"

Connected through hyperedge HE-6 (induced by source paper "subsumption checking in conjunctive coalgebraic fixpoint logics"):
  with members:
    - "graphical representation of covariant contravariant modal formulae"
    - "strong completeness of coalgebraic modal logics"
    - "pspace bounds for rank 1 modal logics"
    - "the complexity of poor man s logic"

Connected through hyperedge HE-7 (induced by source paper "bisimulation based comparisons for interpretations in description logics"):
  with members:
    - "on bisimulations for description logics"
    - "model theoretic characterisations of description logics"
    - "description logic tboxes model theoretic characterizations and rewritability"

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)