Research output: Contribution to journal › Article › peer-review
Some Extremal Problems for Martingale Transforms. I. / Vasyunin, V.I.; Zatitskii, P.B.
In: Journal of Mathematical Sciences, Vol. 284, No. 6, 26.09.2024, p. 735-766.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Some Extremal Problems for Martingale Transforms. I
AU - Vasyunin, V.I.
AU - Zatitskii, P.B.
N1 - Export Date: 19 October 2024 Адрес для корреспонденции: Vasyunin, V.I.; St.Petersburg State UniversityRussian Federation; эл. почта: vasyunin@pdmi.ras.ru
PY - 2024/9/26
Y1 - 2024/9/26
N2 - With this paper, we begin a series of studies of extremal problems for estimating distributions of martingale transforms of bounded martingales. The Bellman functions corresponding to such problems are pointwise minimal diagonally concave functions on a horizontal strip, satisfying certain given boundary conditions. We describe the basic structures that arise when constructing such functions and present a solution in the case of asymmetric boundary conditions and a sufficiently small width of the strip. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2024.
AB - With this paper, we begin a series of studies of extremal problems for estimating distributions of martingale transforms of bounded martingales. The Bellman functions corresponding to such problems are pointwise minimal diagonally concave functions on a horizontal strip, satisfying certain given boundary conditions. We describe the basic structures that arise when constructing such functions and present a solution in the case of asymmetric boundary conditions and a sufficiently small width of the strip. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2024.
UR - https://www.mendeley.com/catalogue/6ac1df05-1d74-3c93-9270-360c3e3c14aa/
U2 - 10.1007/s10958-024-07387-4
DO - 10.1007/s10958-024-07387-4
M3 - статья
VL - 284
SP - 735
EP - 766
JO - Journal of Mathematical Sciences
JF - Journal of Mathematical Sciences
SN - 1072-3374
IS - 6
ER -
ID: 126355210