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: "non singular assembly mode changing trajectories in the workspace for the 3 rps parallel robot"
  Abstract: Having non-singular assembly modes changing trajectories for the 3-RPS parallel robot is a well-known feature. The only known solution for defining such trajectory is to encircle a cusp point in the joint space. In this paper, the aspects and the characteristic surfaces are computed for each operation mode to define the uniqueness of the domains. Thus, we can easily see in the workspace that at least three assembly modes can be reached for each operation mode. To validate this property, the mathematical analysis of the determinant of the Jacobian is done. The image of these trajectories in the joint space is depicted with the curves associated with the cusp points.

Connected through hyperedge HE-1 (induced by source paper "an algebraic method to check the singularity free paths for parallel robots"):
  with members:
    - "uniqueness domains and non singular assembly mode changing trajectories"
    - "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:
    - "uniqueness domains and non singular assembly mode changing trajectories"
    - "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"

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)