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: "forward analysis for wsts part i completions"
  Abstract: Well-structured transition systems provide the right foundation to compute a finite basis of the set of predecessors of the upward closure of a state. The dual problem, to compute a finite representation of the set of successors of the downward closure of a state, is harder: Until now, the theoretical framework for manipulating downward-closed sets was missing. We answer this problem, using insights from domain theory (dcpos and ideal completions), from topology (sobrifications), and shed new light on the notion of adequate domains of limits.

Connected through hyperedge HE-1 (induced by source paper "the ideal approach to computing closed subsets in well quasi orderings"):
  with members:
    - "mixed powerdomains for probability and nondeterminism"
    - "well behaved transition systems"
    - "complexity hierarchies beyond elementary"
    - "demystifying reachability in vector addition systems"
    - "finite automata for the sub and superword closure of cfls descriptional and computational complexity"
    - "the power of priority channel systems"
    - "complexity bounds for ordinal based termination"
    - "computing downward closures for stacked counter automata"

Connected through hyperedge HE-2 (induced by source paper "decidable inductive invariants for verification of cryptographic protocols with unbounded sessions"):
  with members:
    - "approaching the coverability problem continuously"
    - "a proof theoretic analysis of intruder theories"

Connected through hyperedge HE-3 (induced by source paper "regular separability of well structured transition systems"):
  with members:
    - "regular separability of one counter automata"

Connected through hyperedge HE-4 (induced by source paper "well behaved transition systems"):
  with members:
    - "reachability in two dimensional vector addition systems with states is pspace complete"
    - "context free commutative grammars with integer counters and resets"
    - "fixed dimensional energy games are in pseudo polynomial time"
    - "integer vector addition systems with states"
    - "kleene algebras and semimodules for energy problems"
    - "the power of well structured systems"
    - "forward analysis for wsts part ii complete wsts"
    - "multiply recursive upper bounds with higman s lemma"

Connected through hyperedge HE-5 (induced by source paper "demystifying reachability in vector addition systems"):
  with members:
    - "reasoning about data repetitions with counter systems"
    - "complexity hierarchies beyond elementary"
    - "reachability in two dimensional vector addition systems with states is pspace complete"
    - "an approach to computing downward closures"
    - "complexity bounds for ordinal based termination"
    - "the reachability problem for vector addition systems with a stack is not elementary"
    - "algorithmic verification of asynchronous programs"
    - "ackermannian and primitive recursive bounds with dickson s lemma"

Connected through hyperedge HE-6 (induced by source paper "constructing coverability graphs for time basic petri nets"):
  with members:
    - "verification of reachability problems for time basic petri nets"
    - "forward analysis for wsts part ii complete wsts"
    - "reachability analysis of time basic petri nets a time coverage approach"

Connected through hyperedge HE-7 (induced by source paper "model checking vector addition systems with one zero test"):
  with members:
    - "forward analysis for wsts part ii complete wsts"
    - "approximating petri net reachability along context free traces"
    - "the general vector addition system reachability problem by presburger inductive invariants"

Connected through hyperedge HE-8 (induced by source paper "forward analysis for wsts part ii complete wsts"):
  with members:
    - "forward analysis and model checking for trace bounded wsts"

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)