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: "functional answer set programming"
  Abstract: In this paper we propose an extension of Answer Set Programming (ASP), and in particular, of its most general logical counterpart, Quantified Equilibrium Logic (QEL), to deal with partial functions. Although the treatment of equality in QEL can be established in different ways, we first analyse the choice of decidable equality with complete functions and Herbrand models, recently proposed in the literature. We argue that this choice yields some counterintuitive effects from a logic programming and knowledge representation point of view. We then propose a variant called QELF where the set of functions is partitioned into partial and Herbrand functions (we also call constructors). In the rest of the paper, we show a direct connection to Scott's Logic of Existence and present a practical application, proposing an extension of normal logic programs to deal with partial functions and equality, so that they can be translated into function-free normal programs, being possible in this way to compute their answer sets with any standard ASP solver.

Connected through hyperedge HE-1 (induced by source paper "an asp semantics for constraints involving conditional aggregates"):
  with members:
    - "asp core 2 input language format"
    - "hybrid metabolic network completion"
    - "rewriting recursive aggregates in answer set programming back to monotonicity"
    - "vicious circle principle and logic programs with aggregates"
    - "logic programs with propositional connectives and aggregates"
    - "well founded and stable semantics of logic programs with aggregates"

Connected through hyperedge HE-2 (induced by source paper "a rule based system for explainable donor patient matching in liver transplantation"):
  with members:
    - "answering the why in answer set programming a survey of explanation approaches"
    - "deriving conclusions from non monotonic cause effect relations"
    - "causal graph justifications of logic programs"
    - "justifications for logic programs under answer set semantics"

Connected through hyperedge HE-3 (induced by source paper "revisiting explicit negation in answer set programming"):
  with members:
    - "chain programs for writing deterministic metainterpreters"
    - "stable models and an alternative logic programming paradigm"

Connected through hyperedge HE-4 (induced by source paper "functional asp with intensional sets application to gelfond zhang aggregates"):
  with members:
    - "vicious circle principle and logic programs with aggregates"
    - "logic programs with propositional connectives and aggregates"
    - "well founded and stable semantics of logic programs with aggregates"

Connected through hyperedge HE-5 (induced by source paper "modular action language"):
  with members:
    - "sparc sorted asp with consistency restoring rules"
    - "language asp f with arithmetic expressions and consistency restoring rules"
    - "the dlv system for knowledge representation and reasoning"
    - "diagnostic reasoning with a prolog"
    - "stable models and an alternative logic programming paradigm"

Connected through hyperedge HE-6 (induced by source paper "language asp f with arithmetic expressions and consistency restoring rules"):
  with members:
    - "a decidable subclass of finitary programs"
    - "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)