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: "reduction of event structures under history preserving bisimulation"
  Abstract: Event structures represent concurrent processes in terms of events and dependencies between events modelling behavioural relations like causality and conflict. Since the introduction of prime event structures, many variants of event structures have been proposed with different behavioural relations and, hence, with differences in their expressive power. One of the possible benefits of using a more expressive event structure is that of having a more compact representation for the same behaviour when considering the number of events used in a prime event structure. Therefore, this article addresses the problem of reducing the size of an event structure while preserving behaviour under a well-known notion of equivalence, namely history preserving bisimulation. In particular, we investigate this problem on two generalisations of the prime event structures. The first one, known as asymmetric event structure, relies on a asymmetric form of the conflict relation. The second one, known as flow event structure, supports a form of disjunctive causality. More specifically, we describe the conditions under which a set of events in an event structure can be folded into a single event while preserving the original behaviour. The successive application of this folding operation leads to a minimal size event structure. However, the order on which the folding operation is applied may lead to different minimal size event structures. The latter has a negative implication on the potential use of a minimal size event structure as a canonical representation for behaviour.

Connected through hyperedge HE-1 (induced by source paper "minimisation of event structures"):
  with members:
    - "on thin air reads towards an event structures model of relaxed memory"
    - "configuration structures event structures and petri nets"

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)