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: "on synchronous and asynchronous interaction in distributed systems"
  Abstract: When considering distributed systems, it is a central issue how to deal with interactions between components. In this paper, we investigate the paradigms of synchronous and asynchronous interaction in the context of distributed systems. We investigate to what extent or under which conditions synchronous interaction is a valid concept for specification and implementation of such systems. We choose Petri nets as our system model and consider different notions of distribution by associating locations to elements of nets. First, we investigate the concept of simultaneity which is inherent in the semantics of Petri nets when transitions have multiple input places. We assume that tokens may only be taken instantaneously by transitions on the same location. We exhibit a hierarchy of `asynchronous' Petri net classes by different assumptions on possible distributions. Alternatively, we assume that the synchronisations specified in a Petri net are crucial system properties. Hence transitions and their preplaces may no longer placed on separate locations. We then answer the question which systems may be implemented in a distributed way without restricting concurrency, assuming that locations are inherently sequential. It turns out that in both settings we find semi-structural properties of Petri nets describing exactly the problematic situations for interactions in distributed systems.

Connected through hyperedge HE-1 (induced by source paper "justness a completeness criterion for capturing liveness properties"):
  with members:
    - "progress justness and fairness"
    - "analysing mutual exclusion using process algebra with signals"
    - "ensuring liveness properties of distributed systems a research agenda"
    - "structure preserving bisimilarity supporting an operational petri net semantics of ccsp"
    - "progress fairness and justness in process algebra"
    - "a process algebra for wireless mesh networks"
    - "a process algebra for wireless mesh networks used for modelling verifying and analysing aodv"
    - "on characterising distributability"

Connected through hyperedge HE-2 (induced by source paper "on characterising distributability"):
  with members:
    - "on distributability of petri nets"
    - "synchrony vs causality in asynchronous petri nets"
    - "synchrony vs causality in the asynchronous pi calculus"
    - "abstract processes of place transition systems"
    - "branching bisimilarity with explicit divergence"
    - "comparing the expressive power of the synchronous and asynchronous pi calculi"

Connected through hyperedge HE-3 (induced by source paper "on distributability of petri nets"):
  with members:
    - "synchrony vs causality in asynchronous petri nets"
    - "synchrony vs causality in the asynchronous pi calculus"
    - "abstract processes of place transition systems"
    - "branching bisimilarity with explicit divergence"

Connected through hyperedge HE-4 (induced by source paper "an operational petri net semantics for the join calculus"):
  with members:
    - "on distributability of petri nets"
    - "synchrony vs causality in asynchronous petri nets"
    - "symmetric and asymmetric asynchronous interaction"

Connected through hyperedge HE-5 (induced by source paper "synchrony vs causality in asynchronous petri nets"):
  with members:
    - "synchrony vs causality in the asynchronous pi calculus"

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)