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 "an algebraic method to check the singularity free paths for parallel robots"):
  Abstract: Trajectory planning is a critical step while programming the parallel manipulators in a robotic cell. The main problem arises when there exists a singular configuration between the two poses of the end-effectors while discretizing the path with a classical approach. This paper presents an algebraic method to check the feasibility of any given trajectories in the workspace. The solutions of the polynomial equations associated with the tra-jectories are projected in the joint space using Gr{\"o}bner based elimination methods and the remaining equations are expressed in a parametric form where the articular variables are functions of time t unlike any numerical or discretization method. These formal computations allow to write the Jacobian of the manip-ulator as a function of time and to check if its determinant can vanish between two poses. Another benefit of this approach is to use a largest workspace with a more complex shape than a cube, cylinder or sphere. For the Orthoglide, a three degrees of freedom parallel robot, three different trajectories are used to illustrate this method.

Includes members:
  Member "non singular assembly mode changing trajectories in the workspace for the 3 rps parallel robot":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "workspace and singularity analysis of a delta like family robot")
  Member "uniqueness domains and non singular assembly mode changing trajectories":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "workspace and singularity analysis of a delta like family robot")
  Member "on the determination of cusp points of 3 rpr parallel manipulators":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "non singular assembly mode changing trajectories in the workspace for the 3 rps parallel robot")
  Member "kinematics and workspace analysis of a three axis parallel manipulator the orthoglide":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "kinematic analysis and trajectory planning of the orthoglide 5 axis")
  Member "an interval analysis based study for the design and the comparison of 3 dof parallel kinematic machines":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "workspace and singularity analysis of a delta like family robot")
  Member "an exhaustive study of the workspace topologies of all 3r orthogonal manipulators with geometric simplifications":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "workspace and singularity analysis of a delta like family robot")

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)