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: "broy lamport specification problem a gurevich abstract state machine solution"
  Abstract: AbstractWe apply the Gurevich Abstract State Machine methodology to a benchmark speciﬁcation problemof Broy and Lamport. As part of the Dagstuhl Workshop on Reactive Systems, Manfred Broy and Leslie Lamport proposed a“Speciﬁcation Problem” [1]. The problem calls for the speciﬁcation and validation of a small distributedsystem dealing with a remote procedure call interface. Broy and Lamport invited proponents of diﬀerentformal methods to specify and validate the system, in order to compare the results of diﬀerent methods ona common problem.We take up the challenge and specify the problem using the Gurevich abstract state machine (ASM)methodology. Thispaperisself-contained. In Section1, wepresentanintroductiontoGurevichabstractstatemachines, including real-time machines. The remaining sections contain the original problem description ofBroy and Lamport, interspersed with our ASM speciﬁcations and validations.Acknowledgements. The suggestion to give a ASM solution to this problem was made by Egon B¨orgerand Yuri Gurevich; in particular, Yuri Gurevich actively contributed to an early version of the work [6].Leslie Lamport made comments on an early draft of this work; Chuck Wallace made comments on a laterdraft.

Connected through hyperedge HE-1 (induced by source paper "abstract state machines 1988 1998 commented asm bibliography"):
  with members:
    - "equivalence is in the eye of the beholder"
    - "the railroad crossing problem an experiment with instantaneous actions and immediate reactions"
    - "evolving algebras and partial evaluation"

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.SE(Software Engineering)