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: "tractable strong outlier identification"
  Abstract: In knowledge bases expressed in default logic, outliers are sets of literals, or observations, that feature unexpected properties. This paper introduces the notion of strong outliers and studies the complexity problems related to outlier recognition in the fragment of acyclic normal unary theories and the related one of mixed unary theories. We show that recognizing strong outliers in acyclic normal unary theories can be done in polynomial time. Moreover, we show that this result is sharp, since switching to either general outliers, cyclic theories or acyclic mixed unary theories makes the problem intractable. This is the only fragment of default theories known so far for which the general outlier recognition problem is tractable. Based on these results, we have designed a polynomial time algorithm for enumerating all strong outliers of bounded size in an acyclic normal unary default theory. These tractability results rely on the Incremental Lemma, an interesting result on its own, that provides conditions under which a mixed unary default theory displays a monotonic reasoning behavior.

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.AI(Artificial Intelligence)