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1. CJM 2008 (vol 60 pp. 685)

Savu, Anamaria
 Closed and Exact Functions in the Context of Ginzburg--Landau Models For a general vector field we exhibit two Hilbert spaces, namely the space of so called \emph{closed functions} and the space of \emph{exact functions} and we calculate the codimension of the space of exact functions inside the larger space of closed functions. In particular we provide a new approach for the known cases: the Glauber field and the second-order Ginzburg--Landau field and for the case of the fourth-order Ginzburg--Landau field. Keywords:Hermite polynomials, Fock space, Fourier coefficients, Fourier transform, group of symmetriesCategories:42B05, 81Q50, 42A16

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