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: "an algebra of causal chains"
  Abstract: Department of Computer ScienceUniversity of Corunna, SPAINfcabalar, jorge.fandinog@udc.esAbstract. In this work we propose a multi-valued extension of logic programsunder the stable models semantics where each true atom in a model is associ-ated with a set of justiﬁcations, in a similar spirit than a set of proof trees. Themain contribution of this paper is that we capture justiﬁcations into an algebraof truth values with three internal operations: an addition ‘+’ representing alter-native justiﬁcations for a formula, a commutative product ‘’ representing jointinteraction of causes and a non-commutative product ‘’ acting as a concatenationor proof constructor. Using this multi-valued semantics, we obtain a one-to-onecorrespondence between the syntactic proof tree of a standard (non-causal) logicprogram and the interpretation of each true atom in a model. Furthermore, thanksto this algebraic characterization we can detect semantic properties like redun-dancy and relevance of the obtained justiﬁcations. We also identify a lattice-basedcharacterization of this algebra, deﬁning a direct consequences operator, provingits continuity and that its least ﬁx point can be computed after a ﬁnite number ofiterations. Finally, we deﬁne the concept of causal stable model by introducingan analogous transformation to Gelfond and Lifschitz’s program reduct.

Connected through hyperedge HE-1 (induced by source paper "answering the why in answer set programming a survey of explanation approaches"):
  with members:
    - "achievements in answer set programming"
    - "enablers and inhibitors in causal justifications of logic programs"
    - "stepwise debugging of answer set programs"
    - "justifications for programs with disjunctive and causal choice rules"
    - "deriving conclusions from non monotonic cause effect relations"
    - "an integrated graphical user interface for debugging answer set programs"
    - "justifying answer sets using argumentation"
    - "asperix a first order forward chaining approach for answer set computing"

Connected through hyperedge HE-2 (induced by source paper "causal graph justifications of logic programs"):
  with members:
    - "actual causation in cp logic"
    - "defaults and normality in causal structures"
    - "justifications for logic programs under answer set semantics"

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)