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: "a hybrid systems model for simple manipulation and self manipulation systems"
  Abstract: Rigid bodies, plastic impact, persistent contact, Coulomb friction, and massless limbs are ubiquitous simplifications introduced to reduce the complexity of mechanics models despite the obvious physical inaccuracies that each incurs individually. In concert, it is well known that the interaction of such idealized approximations can lead to conflicting and even paradoxical results. As robotics modeling moves from the consideration of isolated behaviors to the analysis of tasks requiring their composition, a mathematically tractable framework for building models that combine these simple approximations yet achieve reliable results is overdue. In this paper we present a formal hybrid dynamical system model that introduces suitably restricted compositions of these familiar abstractions with the guarantee of consistency analogous to global existence and uniqueness in classical dynamical systems. The hybrid system developed here provides a discontinuous but self-consistent approximation to the continuous though possibly very stiff and fast dynamics of a physical robot undergoing intermittent impacts. The modeling choices sacrifice some quantitative numerical efficiencies while maintaining qualitatively correct and analytically tractable results with consistency guarantees promoting their use in formal reasoning about mechanism, feedback control, and behavior design in robots that make and break contact with their environment.

Connected through hyperedge HE-1 (induced by source paper "reactive navigation in partially familiar planar environments using semantic perceptual feedback"):
  with members:
    - "combining optimal control and learning for visual navigation in novel environments"
    - "conceptualization of object compositions using persistent homology"
    - "admissible abstractions for near optimal task and motion planning"
    - "visual memory for robust path following"
    - "yolov3 an incremental improvement"
    - "sampling based methods for factored task and motion planning"
    - "fast autonomous flight in gps denied and cluttered environments"
    - "6 dof object pose from semantic keypoints"

Connected through hyperedge HE-2 (induced by source paper "modeling and analysis of non unique behaviors in multiple frictional impacts"):
  with members:
    - "fundamental limitations in performance and interpretability of common planar rigid body contact models"
    - "a quasi static model and simulation approach for pushing grasping and jamming"
    - "data augmented contact model for rigid body simulation"
    - "sim to real learning agile locomotion for quadruped robots"
    - "learning data efficient rigid body contact models case study of planar impact"
    - "feedback control of the pusher slider system a story of hybrid and underactuated contact dynamics"
    - "a propagative model of simultaneous impact existence uniqueness and design consequences"

Connected through hyperedge HE-3 (induced by source paper "contact implicit trajectory optimization using orthogonal collocation"):
  with members:
    - "simultaneous contact gait and motion planning for robust multi legged locomotion via mixed integer convex optimization"

Connected through hyperedge HE-4 (induced by source paper "first steps towards full model based motion planning and control of quadrupeds a hybrid zero dynamics approach"):
  with members:
    - "dynamic walking on slippery surfaces demonstrating stable bipedal gaits with planned ground slippage"

Connected through hyperedge HE-5 (induced by source paper "nonsmooth optimal value and policy functions for mechanical systems subject to unilateral constraints"):
  with members:
    - "contact implicit trajectory optimization using orthogonal collocation"
    - "decoupled limbs yield differentiable trajectory outcomes through intermittent contact in locomotion and manipulation"
    - "trust region policy optimization"
    - "end to end training of deep visuomotor policies"
    - "infinite horizon policy gradient estimation"

Connected through hyperedge HE-6 (induced by source paper "hybrid ddp in clutter chddp trajectory optimization for hybrid dynamical system in cluttered environments"):
  with members:
    - "hybrid control trajectory optimization under uncertainty"
    - "feedback control of the pusher slider system a story of hybrid and underactuated contact dynamics"

Connected through hyperedge HE-7 (induced by source paper "unsupervised learning for nonlinear piecewise smooth hybrid systems"):
  with members:
    - "robust subspace clustering"
    - "smote synthetic minority over sampling technique"

Connected through hyperedge HE-8 (induced by source paper "decoupled limbs yield differentiable trajectory outcomes through intermittent contact in locomotion and manipulation"):
  with members:
    - "end to end training of deep visuomotor policies"
    - "a compliant underactuated hand for robust manipulation"

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.RO(Robotics)