Geodesic
Spectral synthesis for systems of differential operators with constant coefficients. Duality theorem
Sbornik. Mathematics, Tome 189 (1998) no. 9, pp. 1423-1440 Cet article a éte moissonné depuis la source Math-Net.Ru

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Most known papers on spectral synthesis in complex domains are based on transitions from problems of spectral synthesis to equivalent problems of local description. As a rule, such a transition is carried out in the framework of some special assumptions and meets considerable difficulties. A general method developed in this paper enables one to verify the duality theorem in the setting of several complex variables, when each operator $\pi _p(D)$, $p=1,\dots,q$, acts with respect to a single variable. These assumptions cover the case of a system of partial differential operators. The duality transition here breaks into three separate steps. Two of them are connected with classical results of the theory of analytic functions and only one relates to general duality theory. This allows one to speak about singling out the analytic component of the transition from a spectral synthesis problem to an equivalent problem of local description. 
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     title = {Spectral synthesis for systems of differential operators with constant coefficients. {Duality} theorem},
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     url = {http://geodesic.mathdoc.fr/item/SM_1998_189_9_a5/}
}
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A. B. Shishkin. Spectral synthesis for systems of differential operators with constant coefficients. Duality theorem. Sbornik. Mathematics, Tome 189 (1998) no. 9, pp. 1423-1440. http://geodesic.mathdoc.fr/item/SM_1998_189_9_a5/

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