human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "cuspidal and noncuspidal robot manipulators"):
  Abstract: This article synthezises the most important results on the kinematics of cuspidal manipulators i.e. nonredundant manipulators that can change posture without meeting a singularity. The characteristic surfaces, the uniqueness domains and the regions of feasible paths in the workspace are defined. Then, several sufficient geometric conditions for a manipulator to be noncuspidal are enumerated and a general necessary and sufficient condition for a manipulator to be cuspidal is provided. An explicit DH-parameter-based condition for an orthogonal manipulator to be cuspidal is derived. The full classification of 3R orthogonal manipulators is provided and all types of cuspidal and noncuspidal orthogonal manipulators are enumerated. Finally, some facts about cuspidal and noncuspidal 6R manipulators are reported.

Includes members:
  Member "non singular assembly mode changing motions for 3 rpr parallel manipulators":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "non singular assembly mode changing trajectories in the workspace for the 3 rps parallel robot")
  Member "classification of one family of 3r positioning manipulators":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "an exhaustive study of the workspace topologies of all 3r orthogonal manipulators with geometric simplifications")
  Member "a classification of 3r orthogonal manipulators by the topology of their workspace":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "singular curves in the joint space and cusp points of 3 rpr parallel manipulators")
  Member "workspace and assembly modes in fully parallel manipulators a descriptive study":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "singular surfaces and cusps in symmetric planar 3 rpr manipulators")
  Member "an exhaustive study of the workspace topologies of all 3r orthogonal manipulators with geometric simplifications":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "an algebraic method to check the singularity free paths for parallel robots")

Question: Please tell me which class the source paper 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)