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 "trace and testing metrics on nondeterministic probabilistic processes"):
  Abstract: The combination of \emph{nondeterminism and probability} in concurrent systems lead to the development of several interpretations of process behavior.#R##N#If we restrict our attention to linear properties only, we can identify three main approaches to \emph{trace} and \emph{testing} semantics: the \emph{trace distributions}, the \emph{trace-by-trace} and the \emph{extremal probabilities} approaches.#R##N#In this paper, we propose novel notions of \emph{behavioral metrics} that are based on the three classic approaches above, and that can be used to measure the disparities in the linear behavior of processes wrt.\ trace and testing semantics.#R##N#We study the properties of these metrics, like \emph{non-expansiveness}, and we compare their expressive powers.

Includes members:
  Member "sos based modal decomposition on nondeterministic probabilistic processes":
    also connected through other hyperedges:
      (none)
  Member "logical characterization of trace metrics":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "quantitative aspects of programming languages and systems over the past 2 4 years and beyond")
  Member "logical characterization of bisimulation metrics":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "quantitative aspects of programming languages and systems over the past 2 4 years and beyond")
  Member "revisiting trace and testing equivalences for nondeterministic and probabilistic processes":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "size based termination of higher order rewriting")
  Member "the spectrum of strong behavioral equivalences for nondeterministic and probabilistic processes":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "quantitative aspects of programming languages and systems over the past 2 4 years and beyond")
  Member "characterising testing preorders for finite probabilistic processes":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "ensuring liveness properties of distributed systems open problems")

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.LO(Logic in Computer Science)