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: "a unified dissertation on bearing rigidity theory"
  Abstract: Accounting for the current state-of-the-art, this work aims at summarizing the main notions about the bearing rigidity theory, namely the branch of knowledge investigating the structural properties for multi-element systems necessary to preserve the inter-units bearings when exposed to deformations. Our original contribution consists in the definition of a unified framework for the statement of the principal definitions and results on the bearing rigidity theory that are then particularized by evaluating the most studied metric spaces.

Connected through hyperedge HE-1 (induced by source paper "cooperative manipulation via internal force regulation a rigidity theory perspective"):
  with members:
    - "robust formation control in se 3 for tree graph structures with prescribed transient and steady state performance"
    - "bearing rigidity theory and its applications for control and estimation of network systems life beyond distance rigidity"
    - "robust cooperative manipulation without force torque measurements control design and experiments"
    - "distributed rotational and translational maneuvering of rigid formations and their applications"
    - "bearing rigidity and almost global bearing only formation stabilization"
    - "distributed stabilization control of rigid formations with prescribed orientation"
    - "decentralized rigidity maintenance control with range measurements for multi robot systems"

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.SY(Systems and Control)