human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "timed basic parallel processes"):
  Abstract: Timed basic parallel processes (TBPP) extend communication-free Petri nets (aka. BPP or commutative context-free grammars) by a global notion of time. TBPP can be seen as an extension of timed automata (TA) with context-free branching rules, and as such may be used to model networks of independent timed automata with process creation. #R##N#We show that the coverability and reachability problems (with unary encoded target multiplicities) are PSPACE-complete and EXPTIME-complete, respectively. For the special case of 1-clock TBPP, both are NP-complete and hence not more complex than for untimed BPP. This contrasts with known super-Ackermannian-completeness and undecidability results for general timed Petri nets. #R##N#As a result of independent interest, and basis for our NP upper bounds, we show that the reachability relation of 1-clock TA can be expressed by a formula of polynomial size in the existential fragment of linear arithmetic, which improves on recent results from the literature.

Includes members:
  Member "effective definability of the reachability relation in timed automata":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "theories of real addition with and without a predicate for integers")
  Member "decidability of timed communicating automata":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "timed systems through the lens of logic")
  Member "universal safety for timed petri nets is pspace complete":
    also connected through other hyperedges:
      (none)
  Member "reachability in two clock timed automata is pspace complete":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "life is random time is not markov decision processes with window objectives")
  Member "a faster algorithm for solving one clock priced timed games":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "one clock priced timed games are pspace hard")
  Member "reachability analysis of communicating pushdown systems":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "on reachability for unidirectional channel systems extended with regular tests")
  Member "reachability of communicating timed processes":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "on reachability for unidirectional channel systems extended with regular tests")
  Member "reachability time games on timed automata":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "one clock priced timed games are pspace hard")

Question: Please tell me which class the source paper 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.FL(Formal Languages and Automata Theory)