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: "transition systems for model generators a unifying approach"
  Abstract: A fundamental task for propositional logic is to compute models of propositional formulas. Programs developed for this task are called satisfiability solvers. We show that transition systems introduced by Nieuwenhuis, Oliveras, and Tinelli to model and analyze satisfiability solvers can be adapted for solvers developed for two other propositional formalisms: logic programming under the answer-set semantics, and the logic PC(ID). We show that in each case the task of computing models can be seen as "satisfiability modulo answer-set programming," where the goal is to find a model of a theory that also is an answer set of a certain program. The unifying perspective we develop shows, in particular, that solvers CLASP and MINISATID are closely related despite being developed for different formalisms, one for answer-set programming and the latter for the logic PC(ID).

Connected through hyperedge HE-1 (induced by source paper "abstract solvers for computing cautious consequences of asp programs"):
  with members:
    - "cautious reasoning in asp via minimal models and unsatisfiable cores"
    - "anytime answer set optimization via unsatisfiable core shrinking"
    - "anytime computation of cautious consequences in answer set programming"
    - "the third open answer set programming competition"
    - "consistent query answering via asp from different perspectives theory and practice"
    - "the dlv system for knowledge representation and reasoning"
    - "flux a logic programming method for reasoning agents"
    - "answer sets for consistent query answering in inconsistent databases"

Connected through hyperedge HE-2 (induced by source paper "on relation between constraint answer set programming and satisfiability modulo theories"):
  with members:
    - "constraint answer set solver ezcsp and why integration schemas matter"
    - "conflict driven asp solving with external sources"
    - "the language features and architecture of b prolog"
    - "weight constraints as nested expressions"

Connected through hyperedge HE-3 (induced by source paper "disjunctive answer set solvers via templates"):
  with members:
    - "team building with answer set programming in the gioia tauro seaport"
    - "the dlv system for knowledge representation and reasoning"
    - "unfolding partiality and disjunctions in stable model semantics"
    - "stable models and an alternative logic programming paradigm"

Connected through hyperedge HE-4 (induced by source paper "abstract modular systems and solvers"):
  with members:
    - "solving modular model expansion tasks"
    - "stable models and an alternative logic programming paradigm"

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)