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: "progress fairness and justness in process algebra"
  Abstract: To prove liveness properties of concurrent systems, it is often necessary to postulate progress, fairness and justness properties. This paper investigates how the necessary progress, fairness and justness assumptions can be added to or incorporated in a standard process-algebraic specification formalism. We propose a formalisation that can be applied to a wide range of process algebras. The presented formalism is used to reason about route discovery and packet delivery in the setting of wireless networks.

Connected through hyperedge HE-1 (induced by source paper "ensuring liveness properties of distributed systems open problems"):
  with members:
    - "progress justness and fairness"
    - "reward testing equivalences for processes"
    - "justness a completeness criterion for capturing liveness properties"
    - "analysing mutual exclusion using process algebra with signals"
    - "lean and full congruence formats for recursion"
    - "structure preserving bisimilarity supporting an operational petri net semantics of ccsp"
    - "ccs it s not fair fair schedulers cannot be implemented in ccs like languages even under progress and certain fairness assumptions"
    - "a process algebra for wireless mesh networks"

Connected through hyperedge HE-2 (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"
    - "a process algebra for wireless mesh networks"
    - "a process algebra for wireless mesh networks used for modelling verifying and analysing aodv"
    - "on characterising distributability"
    - "on synchronous and asynchronous interaction in distributed systems"

Connected through hyperedge HE-3 (induced by source paper "progress justness and fairness"):
  with members:
    - "analysing mutual exclusion using process algebra with signals"
    - "ccs it s not fair fair schedulers cannot be implemented in ccs like languages even under progress and certain fairness assumptions"
    - "a process algebra for wireless mesh networks"
    - "a process algebra for wireless mesh networks used for modelling verifying and analysing aodv"
    - "explicit fairness in testing semantics"

Connected through hyperedge HE-4 (induced by source paper "reward testing equivalences for processes"):
  with members:
    - "lean and full congruence formats for recursion"
    - "ensuring liveness properties of distributed systems a research agenda"
    - "on the axiomatizability of impossible futures"
    - "the coarsest precongruences respecting safety and liveness properties"
    - "characterising testing preorders for finite probabilistic processes"

Connected through hyperedge HE-5 (induced by source paper "analysing mutual exclusion using process algebra with signals"):
  with members:
    - "ccs it s not fair fair schedulers cannot be implemented in ccs like languages even under progress and certain fairness assumptions"
    - "a process algebra for wireless mesh networks used for modelling verifying and analysing aodv"
    - "automated analysis of mutex algorithms with fase"
    - "read operators and their expressiveness in process algebras"

Connected through hyperedge HE-6 (induced by source paper "ccs it s not fair fair schedulers cannot be implemented in ccs like languages even under progress and certain fairness assumptions"):
  with members:
    - "a process algebra for wireless mesh networks used for modelling verifying and analysing aodv"
    - "musings on encodings and expressiveness"
    - "reactive turing machines"
    - "abstract processes of place transition systems"

Connected through hyperedge HE-7 (induced by source paper "structure preserving bisimilarity supporting an operational petri net semantics of ccsp"):
  with members:
    - "ccs it s not fair fair schedulers cannot be implemented in ccs like languages even under progress and certain fairness assumptions"
    - "a process algebra for wireless mesh networks used for modelling verifying and analysing aodv"

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)