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: "modularity aspects of disjunctive stable models"
  Abstract: Practically all programming languages allow the programmer to split a program into several modules which brings along several advantages in software development. In this paper, we are interested in the area of answer-set programming where fully declarative and nonmonotonic languages are applied. In this context, obtaining a modular structure for programs is by no means straightforward since the output of an entire program cannot in general be composed from the output of its components. To better understand the effects of disjunctive information on modularity we restrict the scope of analysis to the case of disjunctive logic programs (DLPs) subject to stable-model semantics. We define the notion of a DLP-function, where a well-defined input/output interface is provided, and establish a novel module theorem which indicates the compositionality of stable-model semantics for DLP-functions. The module theorem extends the well-known splitting-set theorem and enables the decomposition of DLP-functions given their strongly connected components based on positive dependencies induced by rules. In this setting, it is also possible to split shared disjunctive rules among components using a generalized shifting technique. The concept of modular equivalence is introduced for the mutual comparison of DLP-functions using a generalization of a translation-based verification method.

Connected through hyperedge HE-1 (induced by source paper "partial compilation of asp programs"):
  with members:
    - "the external interface for extending wasp"
    - "constraint answer set solver ezcsp and why integration schemas matter"
    - "constraints lazy constraints or propagators in asp solving an empirical analysis"
    - "a model building framework for answer set programming with external computations"
    - "asperix a first order forward chaining approach for answer set computing"
    - "optimizing phylogenetic supertrees using answer set programming"
    - "asp modulo csp the clingcon system"
    - "the dlv system for knowledge representation and reasoning"

Connected through hyperedge HE-2 (induced by source paper "strong equivalence and program s structure in arguing essential equivalence between logic programs"):
  with members:
    - "abstract gringo"
    - "first order modular logic programs and their conservative extensions"
    - "lpopt a rule optimization tool for answer set programming"
    - "a common view on strong uniform and other notions of equivalence in answer set programming"
    - "weight constraints as nested expressions"

Connected through hyperedge HE-3 (induced by source paper "on uniform equivalence of epistemic logic programs"):
  with members:
    - "revisiting epistemic specifications"
    - "characterising equilibrium logic and nested logic programs reductions and complexity1 2"
    - "discovering classes of strongly equivalent logic programs"
    - "strong equivalence made easy nested expressions and weight constraints"

Connected through hyperedge HE-4 (induced by source paper "the informal semantics of answer set programming a tarskian perspective"):
  with members:
    - "the dlv system for knowledge representation and reasoning"
    - "extending classical logic with inductive definitions"
    - "stable models and an alternative logic programming paradigm"

Connected through hyperedge HE-5 (induced by source paper "a model building framework for answer set programming with external computations"):
  with members:
    - "clingo asp control preliminary report"
    - "hybrid automated reasoning tools from black box to clear box integration"
    - "conflict driven asp solving with external sources"
    - "asp modulo csp the clingcon system"

Connected through hyperedge HE-6 (induced by source paper "an analysis of the equational properties of the well founded fixed point"):
  with members:
    - "a representation theorem for stratified complete lattices"
    - "a fixed point theorem for non monotonic functions"
    - "minimum model semantics for extensional higher order logic programming with negation"
    - "splitting an operator algebraic modularity results for logics with fixpoint semantics"
    - "minimum model semantics for logic programs with negation as failure"

Connected through hyperedge HE-7 (induced by source paper "stable model counting and its application in probabilistic logic programming"):
  with members:
    - "inference and learning in probabilistic logic programs using weighted boolean formulas"
    - "probabilistic programming concepts"
    - "inference in probabilistic logic programs using weighted cnf s"
    - "the dlv system for knowledge representation and reasoning"

Connected through hyperedge HE-8 (induced by source paper "generalizing modular logic programs"):
  with members:
    - "weight constraints as nested expressions"
    - "strong equivalence made easy nested expressions and weight constraints"
    - "computing preferred answer sets by meta interpretation in answer set programming"
    - "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.LO(Logic in Computer Science)