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: "sampling of stochastic operators"
  Abstract: We develop sampling methodology aimed at identifying stochastic operators that satisfy a support size restriction on the autocorrelation of the operators stochastic spreading function. The data that we use to reconstruct the operator (or, in some cases only the autocorrelation of the spreading function) is based on the response of the unknown operator to a known, deterministic test signal.

Connected through hyperedge HE-1 (induced by source paper "sampling and reconstruction of operators"):
  with members:
    - "cornerstones of sampling of operator theory"
    - "identification of sparse linear operators"
    - "compressive identification of linear operators"
    - "identification of parametric underspread linear systems and super resolution radar"
    - "the restricted isometry property for time frequency structured random matrices"

Connected through hyperedge HE-2 (induced by source paper "cornerstones of sampling of operator theory"):
  with members:
    - "sampling and reconstruction of operators"
    - "estimation of overspread scattering functions"
    - "identification of sparse linear operators"
    - "identification of parametric underspread linear systems and super resolution radar"
    - "the restricted isometry property for time frequency structured random matrices"

Connected through hyperedge HE-3 (induced by source paper "estimation of overspread scattering functions"):
  with members:
    - "reconstruction and estimation of scattering functions of overspread radar targets"

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.IT(Information Theory)