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: "semantical characterizations and complexity of equivalences in answer set programming"
  Abstract: In recent research on non-monotonic logic programming, repeatedly strong equivalence of logic programs P and Q has been considered, which holds if the programs P union R and Q union R have the same answer sets for any other program R. This property strengthens equivalence of P and Q with respect to answer sets (which is the particular case for R is the empty set), and has its applications in program optimization, verification, and modular logic programming. In this paper, we consider more liberal notions of strong equivalence, in which the actual form of R may be syntactically restricted. On the one hand, we consider uniform equivalence, where R is a set of facts rather than a set of rules. This notion, which is well known in the area of deductive databases, is particularly useful for assessing whether programs P and Q are equivalent as components of a logic program which is modularly structured. On the other hand, we consider relativized notions of equivalence, where R ranges over rules over a fixed alphabet, and thus generalize our results to relativized notions of strong and uniform equivalence. For all these notions, we consider disjunctive logic programs in the propositional (ground) case, as well as some restricted classes, provide semantical characterizations and analyze the computational complexity. Our results, which naturally extend to answer set semantics for programs with strong negation, complement the results on strong equivalence of logic programs and pave the way for optimizations in answer set solvers as a tool for input-based problem solving.

Connected through hyperedge HE-1 (induced by source paper "query inseparability for alc ontologies"):
  with members:
    - "conservative extensions in guarded and two variable fragments"
    - "inseparability and conservative extensions of description logic ontologies a survey"
    - "optimizing sparql query answering over owl ontologies"
    - "acyclicity notions for existential rules and their application to query answering in ontologies"
    - "ontology based data access a study through disjunctive datalog csp and mmsnp"
    - "exchanging owl 2 ql knowledge bases"
    - "the logical difference for the lightweight description logic el"
    - "foundations for uniform interpolation and forgetting in expressive description logics"

Connected through hyperedge HE-2 (induced by source paper "on the strong equivalences for lpmln programs"):
  with members:
    - "asp core 2 input language format"
    - "weight learning in a probabilistic extension of answer set programs"
    - "computing lpmln using asp and mln solvers"
    - "probabilistic reasoning with answer sets"
    - "discovering classes of strongly equivalent logic programs"
    - "logic programming with ordered disjunction"

Connected through hyperedge HE-3 (induced by source paper "when you must forget beyond strong persistence when forgetting in answer set programming"):
  with members:
    - "the rise and fall of semantic rule updates based on se models"
    - "the logical difference for the lightweight description logic el"
    - "a system of interaction and structure"
    - "on the practical use of variable elimination in constraint optimization problems still life as a case study"
    - "an abductive framework for computing knowledge base updates"
    - "propositional independence formula variable independence and forgetting"

Connected through hyperedge HE-4 (induced by source paper "dual normal logic programs the forgotten class"):
  with members:
    - "backdoors to normality for disjunctive logic programs"
    - "team building with answer set programming in the gioia tauro seaport"
    - "trichotomy and dichotomy results on the complexity of reasoning with disjunctive logic programs"
    - "characterising equilibrium logic and nested logic programs reductions and complexity1 2"
    - "unfolding partiality and disjunctions in stable model semantics"

Connected through hyperedge HE-5 (induced by source paper "quantified constraints and containment problems"):
  with members:
    - "containment equivalence and coreness from csp to qcsp and beyond"
    - "the complexity of quantified constraint satisfaction collapsibility sink algebras and the three element case"

Connected through hyperedge HE-6 (induced by source paper "fuzzy answer set computation via satisfiability modulo theories"):
  with members:
    - "efficient solving of quantified inequality constraints over the real numbers"
    - "stable models and an alternative logic programming paradigm"

Connected through hyperedge HE-7 (induced by source paper "complexity of super coherence problems in asp"):
  with members:
    - "team building with answer set programming in the gioia tauro seaport"
    - "dynamic magic sets for super consistent answer set programs"
    - "a system of interaction and structure"
    - "the dlv system for knowledge representation and reasoning"
    - "unfolding partiality and disjunctions in stable model semantics"

Connected through hyperedge HE-8 (induced by source paper "the logical difference for the lightweight description logic el"):
  with members:
    - "foundations for uniform interpolation and forgetting in expressive description logics"

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)