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: "coinduction up to in a fibrational setting"
  Abstract: Bisimulation up-to enhances the coinductive proof method for bisimilarity, providing efficient proof techniques for checking properties of different kinds of systems. We prove the soundness of such techniques in a fibrational setting, building on the seminal work of Hermida and Jacobs. This allows us to systematically obtain up-to techniques not only for bisimilarity but for a large class of coinductive predicates modelled as coalgebras. By tuning the parameters of our framework, we obtain novel techniques for unary predicates and nominal automata, a variant of the GSOS rule format for similarity, and a new categorical treatment of weak bisimilarity.

Connected through hyperedge HE-1 (induced by source paper "codensity games for bisimilarity"):
  with members:
    - "codensity lifting of monads and its dual"
    - "path category for free open morphisms from coalgebras with non deterministic branching"
    - "up to techniques for behavioural metrics via fibrations"
    - "healthiness from duality"
    - "sparse positional strategies for safety games"

Connected through hyperedge HE-2 (induced by source paper "cellular monads from positive gsos specifications"):
  with members:
    - "shapely monads and analytic functors"

Connected through hyperedge HE-3 (induced by source paper "behavioural equivalences for timed systems"):
  with members:
    - "weak bisimulation for coalgebras over order enriched monads"
    - "behavioural equivalences for coalgebras with unobservable moves"
    - "on coalgebras with internal moves"
    - "lax functors and coalgebraic weak bisimulation"
    - "gsos for non deterministic processes with quantitative aspects"
    - "structural operational semantics for non deterministic processes with quantitative aspects"
    - "coalgebraic weak bisimulation from recursive equations over monads"
    - "coalgebraic trace semantics for continuous probabilistic transition systems"

Connected through hyperedge HE-4 (induced by source paper "the power of convex algebras"):
  with members:
    - "termination in convex sets of distributions"
    - "a convenient category for higher order probability theory"
    - "high level counterexamples for probabilistic automata"
    - "robust synchronization in markov decision processes"
    - "probabilistic bisimulation naturally on distributions"
    - "when equivalence and bisimulation join forces in probabilistic automata"
    - "church a language for generative models"
    - "relating coalgebraic notions of bisimulation"

Connected through hyperedge HE-5 (induced by source paper "quantitative simulations by matrices"):
  with members:
    - "coalgebraic trace semantics via forgetful logics"
    - "coalgebraic infinite traces and kleisli simulations"
    - "coalgebraic trace semantics for continuous probabilistic transition systems"
    - "sound and complete axiomatizations of coalgebraic language equivalence"
    - "computation of the greatest simulations and bisimulations between fuzzy automata"
    - "bisimulations for fuzzy automata"
    - "simulation vs equivalence"
    - "generic trace semantics via coinduction"

Connected through hyperedge HE-6 (induced by source paper "companions causality and codensity"):
  with members:
    - "stream differential equations specification formats and solution methods"
    - "the largest respectful function"
    - "coalgebraic characterizations of context free languages"
    - "abstract gsos rules and a modular treatment of recursive definitions"

Connected through hyperedge HE-7 (induced by source paper "towards trace metrics via functor lifting"):
  with members:
    - "behavioral metrics via functor lifting"
    - "generalizing determinization from automata to coalgebras"
    - "compositionality of approximate bisimulation for probabilistic systems"
    - "generic trace semantics via coinduction"

Connected through hyperedge HE-8 (induced by source paper "behavioral metrics via functor lifting"):
  with members:
    - "compositionality of approximate bisimulation for probabilistic systems"
    - "approximating a behavioural pseudometric without discount for probabilistic systems"
    - "generic trace semantics via coinduction"

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)