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: "branching bisimilarity of normed bpa processes as a rational monoid"
  Abstract: The paper presents an elaborated and simplified version of the structural#N#result for branching bisimilarity on normed BPA (Basic Process Algebra)#N#processes that was the crux of a conference paper by Czerwinski and Jancar#N#(arxiv 7/2014 and LiCS 2015). That paper focused on the computational#N#complexity, and a NEXPTIME-upper bound has been derived; the authors built on#N#the ideas by Fu (ICALP 2013), and strengthened his decidability result. Later#N#He and Huang announced the EXPTIME-completeness of this problem (arxiv 1/2015,#N#and LiCS 2015), giving a technical proof for the EXPTIME membership. He and#N#Huang indirectly acknowledge the decomposition ideas by Czerwinski and Jancar#N#on which they also built, but it is difficult to separate their starting point#N#from their new ideas. One aim here is to present the previous decomposition#N#result of Czerwinski and Jancar in a technically new framework, noting that#N#branching bisimulation equivalence on normed BPA processes corresponds to a#N#rational monoid (in the sense of [Sakarovitch, 1987]); in particular it is#N#shown that the mentioned equivalence can be decided by normal-form computing#N#deterministic finite transducers. Another aim is to provide a complete#N#description, including an informal overview, that should also make clear how#N#Fu's ideas were used, and to give all proofs in a form that should be readable#N#and easily verifiable.

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)