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: "discretization and fitting of nominal data for autonomous robots"
  Abstract: This paper presents methodologies to discretize nominal robot paths extracted from 3-D CAD drawings. Behind robot path discretization is the ability to have a robot adjusting the traversed paths so that the contact between robot tool and work-piece is properly maintained. In addition, a hybrid force/motion control system based on Fuzzy-PI control is proposed to adjust robot paths with external sensory feedback. All these capabilities allow to facilitate the robot programming process and to increase the robot's autonomy.

Connected through hyperedge HE-1 (induced by source paper "direct off line robot programming via a common cad package"):
  with members:
    - "high level robot programming based on cad dealing with unpredictable environments"
    - "a low cost laser scanning solution for flexible robotic cells spray coating"

Connected through hyperedge HE-2 (induced by source paper "an optimal fuzzy pi force motion controller to increase industrial robot autonomy"):
  with members:
    - "direct off line robot programming via a common cad package"
    - "high level robot programming based on cad dealing with unpredictable environments"

Connected through hyperedge HE-3 (induced by source paper "high level robot programming based on cad dealing with unpredictable environments"):
  with members:
    - "direct off line robot programming via a common cad package"
    - "an optimal fuzzy pi force motion controller to increase industrial robot autonomy"
    - "high level programming and control for industrial robotics using a hand held accelerometer based input device for gesture and posture recognition"
    - "accelerometer based control of an industrial robotic arm"

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)