human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "ψec a local spectral exterior calculus"):
  Abstract: We introduce $\Psi$ec, a discretization of Cartan's exterior calculus of differential forms using wavelets. Our construction consists of wavelet differential r-forms with flexible directional localization that provide tight frames for the spaces $\Omega^r(\mathbb{R}^n)$ of $r$-forms in $\mathbb{R}^2$ and $\mathbb{R}^3$. By construction, the wavelets satisfy the de Rahm co-chain complex, the Hodge decomposition, and that the integral of an $(r+1)$-form is an $r$-form. They also enforce Stokes' theorem for differential forms, which is approximated most efficiently using highly anisotropic, curvelet- or ridgelet-like forms. $\Psi$ec is build on the geometric simplicity of the exterior calculus in the Fourier domain. To be able to use it, we extend existing results on the Fourier transform of differential forms to a frequency domain description of the exterior calculus, including, for example, a Plancherel theorem for forms and a description of the symbols of all important operators.

Includes members:
  Member "divergence free polar wavelets for the analysis and representation of fluid flows":
    also connected through other hyperedges:
      (none)
  Member "polar wavelets in space":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "divergence free polar wavelets for the analysis and representation of fluid flows")
  Member "a local fourier slice equation":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "local fourier slice photography")

Question: Please tell me which class the source paper 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.NA(Numerical Analysis)