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: "uniqueness domains and non singular assembly mode changing trajectories"
  Abstract: Parallel robots admit generally several solutions to the direct kinematics problem. The aspects are associated with the maximal singularity free domains without any singular configurations. Inside these regions, some trajectories are possible between two solutions of the direct kinematic problem without meeting any type of singularity: non-singular assembly mode trajectories. An established condition for such trajectories is to have cusp points inside the joint space that must be encircled. This paper presents an approach based on the notion of uniqueness domains to explain this behaviour.

Connected through hyperedge HE-1 (induced by source paper "an algebraic method to check the singularity free paths for parallel robots"):
  with members:
    - "non singular assembly mode changing trajectories in the workspace for the 3 rps parallel robot"
    - "on the determination of cusp points of 3 rpr parallel manipulators"
    - "kinematics and workspace analysis of a three axis parallel manipulator the orthoglide"
    - "an interval analysis based study for the design and the comparison of 3 dof parallel kinematic machines"
    - "an exhaustive study of the workspace topologies of all 3r orthogonal manipulators with geometric simplifications"

Connected through hyperedge HE-2 (induced by source paper "workspace and singularity analysis of a delta like family robot"):
  with members:
    - "non singular assembly mode changing trajectories in the workspace for the 3 rps parallel robot"
    - "kinematics and workspace analysis of a three axis parallel manipulator the orthoglide"
    - "an interval analysis based study for the design and the comparison of 3 dof parallel kinematic machines"
    - "an exhaustive study of the workspace topologies of all 3r orthogonal manipulators with geometric simplifications"

Connected through hyperedge HE-3 (induced by source paper "non singular assembly mode changing trajectories in the workspace for the 3 rps parallel robot"):
  with members:
    - "on the determination of cusp points of 3 rpr parallel manipulators"
    - "non singular assembly mode changing motions for 3 rpr parallel manipulators"
    - "definition sets for the direct kinematics of parallel manipulators"

Connected through hyperedge HE-4 (induced by source paper "cusp points in the parameter space of degenerate 3 rpr planar parallel manipulators"):
  with members:
    - "on the determination of cusp points of 3 rpr parallel manipulators"
    - "kinematic analysis of a class of analytic planar 3 rpr parallel manipulators"
    - "singular curves in the joint space and cusp points of 3 rpr parallel manipulators"
    - "degeneracy study of the forward kinematics of planar 3 rpr parallel manipulators"

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)