Geodesic
Affine system of Walsh type. Completeness and minimality
Izvestiya of Saratov University. Mathematics. Mechanics. Informatics, Tome 16 (2016) no. 3, pp. 247-256

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The question on completeness and minimality of Walsh affine systems is considered. On the basis of functional-analytical structure of multishift in Hilbert space, which being the generalized analogue of the operator of simple one-side shift and closely connected with Cuntz algebra representations, we give definition of Walsh affine system. Various criteria and tests of completeness of affine systems of functions are established. A biorthogonal conjugate system is found and its completeness is proved. 
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     title = {Affine system of {Walsh} type. {Completeness} and minimality},
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Kh. H. H. Al-Jourany; V. A. Mironov; P. A. Terekhin. Affine system of Walsh type. Completeness and minimality. Izvestiya of Saratov University. Mathematics. Mechanics. Informatics, Tome 16 (2016) no. 3, pp. 247-256. http://geodesic.mathdoc.fr/item/ISU_2016_16_3_a0/