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: "strong equivalence made easy nested expressions and weight constraints"
  Abstract: Logic programs P and Q are strongly equivalent if, given any program R, programs P union R and Q union R are equivalent (that is, have the same answer sets). Strong equivalence is convenient for the study of equivalent transformations of logic programs: one can prove that a local change is correct without considering the whole program. Lifschitz, Pearce and Valverde showed that Heyting's logic of here-and-there can be used to characterize strong equivalence for logic programs with nested expressions (which subsume the better-known extended disjunctive programs). This note considers a simpler, more direct characterization of strong equivalence for such programs, and shows that it can also be applied without modification to the weight constraint programs of Niemela and Simons. Thus, this characterization of strong equivalence is convenient for the study of equivalent transformations of logic programs written in the input languages of answer set programming systems dlv and smodels. The note concludes with a brief discussion of results that can be used to automate reasoning about strong equivalence, including a novel encoding that reduces the problem of deciding the strong equivalence of a pair of weight constraint programs to that of deciding the inconsistency of a weight constraint program.

Connected through hyperedge HE-1 (induced by source paper "on uniform equivalence of epistemic logic programs"):
  with members:
    - "revisiting epistemic specifications"
    - "modularity aspects of disjunctive stable models"
    - "characterising equilibrium logic and nested logic programs reductions and complexity1 2"
    - "discovering classes of strongly equivalent logic programs"

Connected through hyperedge HE-2 (induced by source paper "epistemic logic programs a different world view"):
  with members:
    - "revisiting epistemic specifications"
    - "characterising equilibrium logic and nested logic programs reductions and complexity1 2"
    - "discovering classes of strongly equivalent logic programs"

Connected through hyperedge HE-3 (induced by source paper "syntax preserving belief change operators for logic programs"):
  with members:
    - "characterization of logic program revision as an extension of propositional revision"
    - "the rise and fall of semantic rule updates based on se models"
    - "a program level approach to revising logic programs under the answer set semantics"
    - "updates in answer set programming an approach based on basic structural properties"
    - "a semantic framework for preference handling in answer set programming"
    - "a framework for compiling preferences in logic programs"
    - "on properties of update sequences based on causal rejection"

Connected through hyperedge HE-4 (induced by source paper "exception based knowledge updates"):
  with members:
    - "the rise and fall of semantic rule updates based on se models"
    - "on the evolution of the instance level of dl lite knowledge bases"
    - "splitting and updating hybrid knowledge bases"
    - "updates in answer set programming an approach based on basic structural properties"
    - "an abductive framework for computing knowledge base updates"
    - "on properties of update sequences based on causal rejection"

Connected through hyperedge HE-5 (induced by source paper "characterization of logic program revision as an extension of propositional revision"):
  with members:
    - "the rise and fall of semantic rule updates based on se models"
    - "linear logic based analysis of constraint handling rules with disjunction"
    - "propositional theories are strongly equivalent to logic programs"
    - "an abductive framework for computing knowledge base updates"
    - "on properties of update sequences based on causal rejection"

Connected through hyperedge HE-6 (induced by source paper "rewriting recursive aggregates in answer set programming back to monotonicity"):
  with members:
    - "anytime computation of cautious consequences in answer set programming"
    - "vicious circle principle and logic programs with aggregates"
    - "conflict driven asp solving with external sources"
    - "unfounded sets and well founded semantics of answer set programs with aggregates"
    - "relating weight constraint and aggregate programs semantics and representation"
    - "logic programs with propositional connectives and aggregates"
    - "design and implementation of aggregate functions in the dlv system"
    - "properties and applications of programs with monotone and convex constraints"

Connected through hyperedge HE-7 (induced by source paper "the rise and fall of semantic rule updates based on se models"):
  with members:
    - "splitting and updating hybrid knowledge bases"
    - "a program level approach to revising logic programs under the answer set semantics"
    - "propositional theories are strongly equivalent to logic programs"
    - "updates in answer set programming an approach based on basic structural properties"
    - "an abductive framework for computing knowledge base updates"
    - "on properties of update sequences based on causal rejection"

Connected through hyperedge HE-8 (induced by source paper "generalizing modular logic programs"):
  with members:
    - "modularity aspects of disjunctive stable models"
    - "weight constraints as nested expressions"
    - "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)