Yu. A. Chapovsky

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Articles: 6

On Fourier algebra of a hypergroup constructed from a conditional expectation on a locally compact group

MFAT 23 (2017), no. 1, 37-50

37-50

We prove that the Fourier space of a hypergroup constructed from a conditional expectation on a locally compact group has a Banach algebra structure.

On Fourier algebra of a locally compact hypergroup

MFAT 21 (2015), no. 3, 246-255

246-255

We give sufficient conditions for the Fourier and the Fourier-Stieltjes spaces of a locally compact hypergroup to be Banach algebras.

On infinitesimal structure of a hypergroup that originates from a Lie group

MFAT 17 (2011), no. 4, 319-329

319-329

We describe an infinitesimal algebra to a hypergroup constructed from a Lie group and a conditional expectation. We also prove a theorem on a decomposition of the conditional expectation into the product of a counital conditional expectation and the one that arises in the double coset construction.

Harmonic analysis on a locally compact hypergroup

MFAT 16 (2010), no. 4, 304-332

304-332

We propose a new axiomatics for a locally compact hypergroup. On the one hand, the new object generalizes a DJS-hypergroup and, on the other hand, it allows to obtain results similar to those for a unimodular hypecomplex system with continuous basis. We construct a harmonic analysis and, for a commutative locally compact hypergroup, give an analogue of the Pontryagin duality theorem.

Generalized Hilbert bialgebras of compact type and their representations

MFAT 11 (2005), no. 3, 222-233

222-233

On the inverse spectral problem for a commutative field of operator-valued Jacobi matrices

MFAT 8 (2002), no. 1, 14-22

14-22