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: "verification of reachability problems for time basic petri nets"
  Abstract: Time-Basic Petri nets, is a powerful formalism for model- ing real-time systems where time constraints are expressed through time functions of marking's time description associated with transition, representing possible firing times. We introduce a technique for reachability analysis based on the building of finite contraction of the infinite state space associated with such a models. The technique constructs a finite symbolic reachability graph relying on a sort of time coverage, and over- comes the limitations of the existing available analyzers for Time-Basic nets, based in turn on a time-bounded inspection of a (possibly infinite) reachability-tree. A key feature of the technique is the introduction of the Time Anonymous concept, which allows the identification of components not influencing the evolution of a model. A running example is used throughout the paper to sketch the symbolic graph construction. The graph construction algorithm has been automated by a Java tool-set, described in the paper together with its main functionality and analysis capability. A use case describing a real-world example has been employed to benchmark the technique and the tool-set. The main outcome of this test are also presented in the paper.

Connected through hyperedge HE-1 (induced by source paper "constructing coverability graphs for time basic petri nets"):
  with members:
    - "forward analysis for wsts part ii complete wsts"
    - "reachability analysis of time basic petri nets a time coverage approach"
    - "forward analysis for wsts part i completions"

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)