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 "completeness and incompleteness of synchronous kleene algebra"):
  Abstract: Synchronous Kleene algebra (SKA), an extension of Kleene algebra (KA), was proposed by Prisacariu as a tool for reasoning about programs that may execute synchronously, i.e., in lock-step. We provide a countermodel witnessing that the axioms of SKA are incomplete w.r.t. its language semantics, by exploiting a lack of interaction between the synchronous product operator and the Kleene star. We then propose an alternative set of axioms for SKA, based on Salomaa's axiomatisation of regular languages, and show that these provide a sound and complete characterisation w.r.t. the original language semantics.

Includes members:
  Member "kleene algebra with observations":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "concurrent kleene algebra with observations from hypotheses to completeness")
  Member "completeness theorems for pomset languages and concurrent kleene algebras":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "generating posets beyond n")
  Member "concurrent kleene algebra free model and completeness":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "concurrent kleene algebra with observations from hypotheses to completeness")
  Member "a synchronous program algebra a basis for reasoning about shared memory and event based concurrency":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "handling localisation in rely guarantee concurrency an algebraic approach")
  Member "an algebra of synchronous atomic steps":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "handling localisation in rely guarantee concurrency an algebraic approach")
  Member "generalised rely guarantee concurrency an algebraic foundation":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "some challenges of specifying concurrent program components")

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)