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: "initial algebra semantics for cyclic sharing tree structures"
  Abstract: Terms are a concise representation of tree structures. Since they can be#N#naturally defined by an inductive type, they offer data structures in#N#functional programming and mechanised reasoning with useful principles such as#N#structural induction and structural recursion. However, for graphs or#N#"tree-like" structures - trees involving cycles and sharing - it remains#N#unclear what kind of inductive structures exists and how we can faithfully#N#assign a term representation of them. In this paper we propose a simple term#N#syntax for cyclic sharing structures that admits structural induction and#N#recursion principles. We show that the obtained syntax is directly usable in#N#the functional language Haskell and the proof assistant Agda, as well as#N#ordinary data structures such as lists and trees. To achieve this goal, we use#N#a categorical approach to initial algebra semantics in a presheaf category.#N#That approach follows the line of Fiore, Plotkin and Turi's models of abstract#N#syntax with variable binding.

Connected through hyperedge HE-1 (induced by source paper "the algebra of recursive graph transformation language uncal complete axiomatisation and iteration categorical semantics"):
  with members:
    - "iteration algebras for unql graphs and completeness for bisimulation"
    - "relating coalgebraic notions of bisimulation"
    - "orthomodular lattices foulis semigroups and dagger kernel categories"
    - "small step and big step semantics for call by need"
    - "termination and confluence of higher order rewrite systems"
    - "inductive data type systems"

Connected through hyperedge HE-2 (induced by source paper "an abstract view on syntax with sharing"):
  with members:
    - "orthomodular lattices foulis semigroups and dagger kernel categories"

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)