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: "formal specification and verification of autonomous robotic systems a survey"
  Abstract: Robotic systems are complex and critical: they are inherently hybrid, combining both hardware and software; they typically exhibit both cyber-physical attributes and autonomous capabilities; and are required to be at least safe and often ethical. While for many engineered systems testing, either through real deployment or via simulation, is deemed sufficient the uniquely challenging elements of robotic systems, together with the crucial dependence on sophisticated software control and decision-making, requires a stronger form of verification. The increasing deployment of robotic systems in safety-critical scenarios exacerbates this still further and leads us towards the use of formal methods to ensure the correctness of, and provide sufficient evidence for the certification of, robotic systems. There have been many approaches that have used some variety of formal specification or formal verification in autonomous robotics, but there is no resource that collates this activity in to one place. This paper systematically surveys the state-of-the art in specification formalisms and tools for verifying robotic systems. Specifically, it describes the challenges arising from autonomy and software architectures, avoiding low-level hardware control and is subsequently identifies approaches for the specification and verification of robotic systems, while avoiding more general approaches.

Connected through hyperedge HE-1 (induced by source paper "a two stage optimization approach to safe by design planning for autonomous driving"):
  with members:
    - "parot a practical framework for robust deep neural network training"
    - "reinforcement learning for temporal logic control synthesis with probabilistic satisfaction guarantees"
    - "autonomous agents modelling other agents a comprehensive survey and open problems"
    - "learning to drive from simulation without real world labels"
    - "end to end learning for self driving cars"
    - "concrete problems in ai safety"
    - "towards verified artificial intelligence"
    - "safety verification of deep neural networks"

Connected through hyperedge HE-2 (induced by source paper "towards a framework for certification of reliable autonomous systems"):
  with members:
    - "stream runtime monitoring on uas"
    - "robotics and integrated formal methods necessity meets opportunity"
    - "towards moral autonomous systems"
    - "arsenal automatic requirements specification extraction from natural language"

Connected through hyperedge HE-3 (induced by source paper "explainable software for cyber physical systems es4cps report from the gi dagstuhl seminar 19023 january 06 11 2019 schloss dagstuhl"):
  with members:
    - "the orca hub explainable offshore robotics through intelligent interfaces"
    - "introducing liveness into multi lane spatial logic lane change controllers using uppaal"
    - "explainable security"
    - "explain yourself a natural language interface for scrutable autonomous robots"
    - "rapid quality assurance with requirements smells"
    - "imperfect knowledge in autonomous urban traffic manoeuvres"
    - "cyber physical systems security a survey"
    - "causes and explanations a structural model approach part ii explanations"

Connected through hyperedge HE-4 (induced by source paper "specification patterns for robotic missions"):
  with members:
    - "extended ltlvis motion planning interface"
    - "synthesizing a lego forklift controller in gr 1 a case study"
    - "a requirements modeling language for the component behavior of cyber physical robotics systems"
    - "optimal multi robot path planning with temporal logic constraints"
    - "events in linear time properties"

Connected through hyperedge HE-5 (induced by source paper "towards integrating formal verification of autonomous robots with battery prognostics and health management"):
  with members:
    - "probabilistic model checking of robots deployed in extreme environments"
    - "observation enhanced qos analysis of component based systems"
    - "robotics and integrated formal methods necessity meets opportunity"
    - "autonomous agent behaviour modelled in prism a case study"

Connected through hyperedge HE-6 (induced by source paper "new opportunities for integrated formal methods"):
  with members:
    - "model based system assurance using the structured assurance case metamodel"
    - "fifty years of software engineering or the view from garmisch"
    - "safety practice and its practitioners exploring a diverse profession"
    - "formal methods oversold underused a survey"
    - "robotics and integrated formal methods necessity meets opportunity"
    - "report on the nsf workshop on formal methods for security"
    - "introduction of static quality analysis in small and medium sized software enterprises experiences from technology transfer"
    - "towards a formalization of the unified modeling language"

Connected through hyperedge HE-7 (induced by source paper "probabilistic model checking of robots deployed in extreme environments"):
  with members:
    - "robotics and integrated formal methods necessity meets opportunity"
    - "accelerating parametric probabilistic verification"
    - "probabilistically safe vehicle control in a hostile environment"

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.FL(Formal Languages and Automata Theory)