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: "branching bisimilarity with explicit divergence"
  Abstract: We consider the relational characterisation of branching bisimilarity with explicit divergence. We prove that it is an equivalence and that it coincides with the original definition of branching bisimilarity with explicit divergence in terms of coloured traces. We also establish a correspondence with several variants of an action-based modal logic with until- and divergence modalities.

Connected through hyperedge HE-1 (induced by source paper "ensuring liveness properties of distributed systems open problems"):
  with members:
    - "progress justness and fairness"
    - "reward testing equivalences for processes"
    - "justness a completeness criterion for capturing liveness properties"
    - "analysing mutual exclusion using process algebra with signals"
    - "lean and full congruence formats for recursion"
    - "structure preserving bisimilarity supporting an operational petri net semantics of ccsp"
    - "ccs it s not fair fair schedulers cannot be implemented in ccs like languages even under progress and certain fairness assumptions"
    - "progress fairness and justness in process algebra"

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"
    - "divide and congruence ii from decomposition of modal formulas to preservation of delay and weak bisimilarity"
    - "computation tree logic with deadlock detection"

Connected through hyperedge HE-3 (induced by source paper "correct and efficient antichain algorithms for refinement checking"):
  with members:
    - "a branching time model of csp"
    - "generalizing the paige tarjan algorithm by abstract interpretation"

Connected through hyperedge HE-4 (induced by source paper "distribution of behaviour into parallel communicating subsystems"):
  with members:
    - "unique parallel decomposition in branching and weak bisimulation semantics"

Connected through hyperedge HE-5 (induced by source paper "a theory of encodings and expressiveness"):
  with members:
    - "lean and full congruence formats for recursion"
    - "priorities without priorities representing preemption in psi calculi"
    - "on the expressiveness of intensional communication"
    - "expressiveness via intensionality and concurrency"

Connected through hyperedge HE-6 (induced by source paper "rooted divergence preserving branching bisimilarity is a congruence"):
  with members:
    - "sequential composition in the presence of intermediate termination extended abstract"
    - "lean and full congruence formats for recursion"
    - "on the executability of interactive computation"
    - "computation tree logic with deadlock detection"

Connected through hyperedge HE-7 (induced by source paper "ensuring liveness properties of distributed systems a research agenda"):
  with members:
    - "structure preserving bisimilarity supporting an operational petri net semantics of ccsp"
    - "automated analysis of aodv using uppaal"
    - "a process algebra for wireless mesh networks"
    - "a process algebra for wireless mesh networks used for modelling verifying and analysing aodv"
    - "sequence numbers do not guarantee loop freedom aodv can yield routing loops"
    - "on characterising distributability"
    - "psi calculi a framework for mobile processes with nominal data and logic"

Connected through hyperedge HE-8 (induced by source paper "sequential composition in the presence of intermediate termination extended abstract"):
  with members:
    - "sequential composition in the presence of intermediate termination"
    - "on the executability of interactive computation"
    - "expressiveness modulo bisimilarity of regular expressions with parallel composition"
    - "reactive turing machines"
    - "computation tree logic with deadlock detection"

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)