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 "ensuring liveness properties of distributed systems open problems"):
  Abstract: Abstract   Often fairness assumptions need to be made in order to establish liveness properties of distributed systems, but in many situations they lead to false conclusions.  This document presents a research agenda aiming at laying the foundations of a theory of concurrency that is equipped to ensure liveness properties of distributed systems without making fairness assumptions. This theory will encompass process algebra, temporal logic and semantic models. The agenda also includes the development of a methodology and tools that allow successful application of this theory to the specification, analysis and verification of realistic distributed systems.  Contemporary process algebras and temporal logics fail to make distinctions between systems of which one has a crucial liveness property and the other does not, at least when assuming justness, a strong progress property, but not assuming fairness. Setting up an alternative framework involves giving up on identifying strongly bisimilar systems, inventing new induction principles, developing new axiomatic bases for process algebras and new congruence formats for operational semantics, and creating matching treatments of time and probability.  Even simple systems like fair schedulers or mutual exclusion protocols cannot be accurately specified in standard process algebras (or Petri nets) in the absence of fairness assumptions. Hence the work involves the study of adequate language or model extensions, and their expressive power.

Includes members:
  Member "progress justness and fairness":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "justness a completeness criterion for capturing liveness properties")
  Member "reward testing equivalences for processes":
    also connected through other hyperedges:
      (none)
  Member "justness a completeness criterion for capturing liveness properties":
    also connected through other hyperedges:
      (none)
  Member "analysing mutual exclusion using process algebra with signals":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "justness a completeness criterion for capturing liveness properties")
  Member "lean and full congruence formats for recursion":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "failure trace semantics for a process algebra with time outs preliminary report")
  Member "structure preserving bisimilarity supporting an operational petri net semantics of ccsp":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "justness a completeness criterion for capturing liveness properties")
  Member "ccs it s not fair fair schedulers cannot be implemented in ccs like languages even under progress and certain fairness assumptions":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "progress justness and fairness")
  Member "progress fairness and justness in process algebra":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "justness a completeness criterion for capturing liveness properties")

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)