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: "an interval analysis based study for the design and the comparison of 3 dof parallel kinematic machines"
  Abstract: This paper addresses an interval analysis based study that is applied to the design and the comparison of 3-DOF parallel kinematic machines. Two design criteria are used, (i) a regular workspace shape and, (ii) a kinetostatic performance index that needs to be as homogeneous as possible throughout the workspace. The interval analysis based method takes these two criteria into account: on the basis of prescribed kinetostatic performances, the workspace is analysed to find out the largest regular dextrous workspace enclosed in the Cartesian workspace. An algorithm describing this method is introduced. Two 3-DOF translational parallel mechanisms designed for machining applications are compared using this method. The first machine features three fixed linear joints which are mounted orthogonally and the second one features three linear joints which are mounted in parallel. In both cases, the mobile platform moves in the Cartesian x y z space with fixed orientation.

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"
    - "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 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"
    - "uniqueness domains and non singular assembly mode changing trajectories"
    - "kinematics and workspace analysis of a three axis parallel manipulator the orthoglide"
    - "an exhaustive study of the workspace topologies of all 3r orthogonal manipulators with geometric simplifications"

Connected through hyperedge HE-3 (induced by source paper "solution regions in the parameter space of a 3 rrr decoupled robot for a prescribed workspace"):
  with members:
    - "new trends in mechanism science"

Connected through hyperedge HE-4 (induced by source paper "joint space and workspace analysis of a two dof closed chain manipulator"):
  with members:
    - "definition sets for the direct kinematics of parallel manipulators"

Connected through hyperedge HE-5 (induced by source paper "kinetostatic performance of a planar parallel mechanism with variable actuation"):
  with members:
    - "the kinematic analysis of a symmetrical three degree of freedom planar parallel manipulator"

Connected through hyperedge HE-6 (induced by source paper "kinematic and stiffness analysis of the orthoglide a pkm with simple regular workspace and homogeneous performances"):
  with members:
    - "architecture optimization of a 3 dof translational parallel mechanism for machining applications the orthoglide"
    - "kinematics and workspace analysis of a three axis parallel manipulator the orthoglide"
    - "parametric stiffness analysis of the orthoglide"
    - "sensitivity analysis of the orthoglide a 3 dof translational parallel kinematic machine"
    - "design strategies for the geometric synthesis of orthoglide type mechanisms"

Connected through hyperedge HE-7 (induced by source paper "a design oriented study for 3r orthogonal manipulators with geometric simplifications"):
  with members:
    - "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)