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: "divide and congruence ii from decomposition of modal formulas to preservation of delay and weak bisimilarity"
  Abstract: Earlier we presented a method to decompose modal formulas for processes with the internal action  τ , and congruence formats for branching and  η   -bisimilarity were derived on the basis of this decomposition method. The idea is that a congruence format for a semantics must ensure that the formulas in the modal characterisation of this semantics are always decomposed into formulas that are again in this modal characterisation. In this follow-up paper the decomposition method is enhanced to deal with modal characterisations that contain a modality   〈ϵ〉〈a〉φ     〈  ϵ  〉  〈  a  〉  φ       , to derive congruence formats for delay and weak bisimilarity.

Connected through hyperedge HE-1 (induced by source paper "up to techniques for branching bisimilarity"):
  with members:
    - "divide and congruence iii from decomposition of modal formulas to preservation of stability and divergence"
    - "distributive laws for monotone specifications"
    - "weak bisimulation for coalgebras over order enriched monads"
    - "extracting verified decision procedures dpll and resolution"

Connected through hyperedge HE-2 (induced by source paper "divide and congruence iii from decomposition of modal formulas to preservation of stability and divergence"):
  with members:
    - "sequential composition in the presence of intermediate termination extended abstract"
    - "computation tree logic with deadlock detection"
    - "branching bisimilarity with explicit divergence"

Connected through hyperedge HE-3 (induced by source paper "sos based modal decomposition on nondeterministic probabilistic processes"):
  with members:
    - "logical characterization of trace metrics"
    - "logical characterization of bisimulation metrics"
    - "revisiting trace and testing equivalences for nondeterministic and probabilistic processes"
    - "logical metric and algorithmic characterisations of probabilistic bisimulation"

Connected through hyperedge HE-4 (induced by source paper "logical characterization of bisimulation metrics"):
  with members:
    - "modal characterisations of behavioural pseudometrics"
    - "topologies of stochastic markov models computational aspects"
    - "probabilistic bisimulation naturally on distributions"
    - "fixed point characterization of compositionality properties of probabilistic processes combinators"
    - "when equivalence and bisimulation join forces in probabilistic automata"
    - "continuous markovian logics axiomatization and quantified metatheory"
    - "logical metric and algorithmic characterisations of probabilistic bisimulation"
    - "characterising probabilistic processes logically"

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)