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: "kinematics analysis of the parallel module of the verne machine"
  Abstract: The paper derives the inverse and forward kinematic equations of a spatial three-degree-of-freedom parallel mechanism, which is the parallel module of a hybrid serial-parallel 5-axis machine tool. This parallel mechanism consists of a moving platform that is connected to a fixed base by three non-identical legs. Each leg is made up of one prismatic and two pair spherical joint, which are connected in a way that the combined effects of the three legs lead to an over- constrained mechanism with complex motion. This motion is defined as a simultaneous combination of rotation and translation.

Connected through hyperedge HE-1 (induced by source paper "stiffness analysis of 3 d o f overconstrained translational parallel manipulators"):
  with members:
    - "architecture optimization of a 3 dof translational parallel mechanism for machining applications the orthoglide"
    - "the design of parallel kinematic machine tools using kinetostatic performance criteria"
    - "parametric stiffness analysis of the orthoglide"
    - "kinematic and stiffness analysis of the orthoglide a pkm with simple regular workspace and homogeneous performances"

Connected through hyperedge HE-2 (induced by source paper "analyse de la rigidit e des machines outils 3 axes d architecture parall ele hyperstatique"):
  with members:
    - "the design of parallel kinematic machine tools using kinetostatic performance criteria"
    - "parametric stiffness analysis of the orthoglide"
    - "kinematic and stiffness analysis of the orthoglide a pkm with simple regular workspace and homogeneous performances"

Connected through hyperedge HE-3 (induced by source paper "workspace and kinematic analysis of the verne machine"):
  with members:
    - "the design of parallel kinematic machine tools using kinetostatic performance criteria"
    - "workspace analysis of the parallel module of the verne machine"

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)