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: "on differentially dissipative dynamical systems"
  Abstract: Dissipativity is an essential concept of systems theory. The paper provides an extension of dissipativity, named differential dissipativity, by lifting storage functions and supply rates to the tangent bundle. Differential dissipativity is connected to incremental stability in the same way as dissipativity is connected to stability. It leads to a natural formulation of differential passivity when restricting to quadratic supply rates. The paper also shows that the interconnection of differentially passive systems is differentially passive, and provides preliminary examples of differentially passive electrical systems.

Connected through hyperedge HE-1 (induced by source paper "robust contraction analysis of nonlinear systems via differential iqc"):
  with members:
    - "contraction analysis of switched systems via regularization"
    - "control contraction metrics convex and intrinsic criteria for nonlinear feedback design"
    - "a differential lyapunov framework for contraction analysis"

Connected through hyperedge HE-2 (induced by source paper "differentially passive circuits that switch and oscillate"):
  with members:
    - "dominance analysis of linear complementarity systems"
    - "analysis of lur e dominant systems in the frequency domain"
    - "a dissipativity theorem for p dominant systems"
    - "a differential lyapunov framework for contraction analysis"

Connected through hyperedge HE-3 (induced by source paper "differential dissipativity theory for dominance analysis"):
  with members:
    - "a dissipativity theorem for p dominant systems"
    - "differential positivity on compact sets"
    - "differentially positive systems"
    - "on differential passivity of physical systems"
    - "a differential lyapunov framework for contraction analysis"

Connected through hyperedge HE-4 (induced by source paper "differential analysis of nonlinear systems revisiting the pendulum example"):
  with members:
    - "differentially positive systems"
    - "on differential passivity of physical systems"
    - "a differential lyapunov framework for contraction analysis"

Connected through hyperedge HE-5 (induced by source paper "on differential passivity of physical systems"):
  with members:
    - "a differential lyapunov framework for contraction analysis"

Connected through hyperedge HE-6 (induced by source paper "a differential lyapunov framework for contraction analysis"):
  with members:
    - "on differential passivity of physical 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)