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: "the keymaera x proof ide concepts on usability in hybrid systems theorem proving"
  Abstract: Hybrid systems verification is quite important for developing correct controllers for physical systems, but is also challenging. Verification engineers, thus, need to be empowered with ways of guiding hybrid systems verification while receiving as much help from automation as possible. Due to undecidability, verification tools need sufficient means for intervening during the verification and need to allow verification engineers to provide system design insights. #R##N#This paper presents the design ideas behind the user interface for the hybrid systems theorem prover KeYmaera X. We discuss how they make it easier to prove hybrid systems as well as help learn how to conduct proofs in the first place. Unsurprisingly, the most difficult user interface challenges come from the desire to integrate automation and human guidance. We also share thoughts how the success of such a user interface design could be evaluated and anecdotal observations about it.

Connected through hyperedge HE-1 (induced by source paper "toward structured proofs for dynamic logics"):
  with members:
    - "a complete uniform substitution calculus for differential dynamic logic"
    - "sapo reachability computation and parameter synthesis of polynomial dynamical systems"
    - "a uniform substitution calculus for differential dynamic logic"
    - "satisfiability modulo odes"
    - "a complete axiomatization of quantified differential dynamic logic for distributed hybrid systems"
    - "the structure of differential invariants and differential cut elimination"

Connected through hyperedge HE-2 (induced by source paper "relational differential dynamic logic"):
  with members:
    - "differential equation axiomatization the impressive power of differential ghosts"
    - "probabilistic relational reasoning via metrics"
    - "ranking and repulsing supermartingales for reachability in probabilistic programs"
    - "a complete uniform substitution calculus for differential dynamic logic"
    - "a relational logic for higher order programs"

Connected through hyperedge HE-3 (induced by source paper "overview of logical foundations of cyber physical systems"):
  with members:
    - "uniform substitution in one fell swoop"
    - "verifiably safe off model reinforcement learning"
    - "differential equation axiomatization the impressive power of differential ghosts"
    - "formal verification of obstacle avoidance and navigation of ground robots"

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)