Exact convergence rates of alternating projections for nontransversal intersections
Exact convergence rates of alternating projections for nontransversal intersections
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非横向交叉点交替投影的精确收敛率
DOI:
10.1007/s13160-023-00584-9
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发表时间:
2023
影响因子:
0.9
通讯作者:
Waki Hayato
中科院分区:
文献类型:
--
作者:
Ochiai Hiroyuki;Sekiguchi Yoshiyuki;Waki Hayato
We consider the convergence rate of the alternating projection method for the nontransversal intersection of a semialgebraic set and a linear subspace. For such an intersection, the convergence rate is known as sublinear in the worst case. We study the exact convergence rate for a given semialgebraic set and an initial point, and investigate when the convergence rate is linear or sublinear. As a consequence, we show that the exact rates are expressed by multiplicities of the defining polynomials of the semialgebraic set, or related power series in the case that the linear subspace is a line, and we also decide the convergence rate for given data by using elimination theory. Our methods are also applied to give upper bounds for the case that the linear subspace has the dimension more than one. The upper bounds are shown to be tight by obtaining exact convergence rates for a specific semialgebraic set, which depend on the initial points.
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DOI:
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发表时间:
2012
期刊:
影响因子:
--
作者:
A. Haraux
通讯作者:
A. Haraux
DOI:
10.1090/s0002-9939-2014-12061-2
发表时间:
2014
期刊:
--
影响因子:
--
作者:
K. Kurdyka;S. Spodzieja
通讯作者:
S. Spodzieja
影响因子:
0.6
作者:
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通讯作者:
T. Pham
影响因子:
1.1
作者:
Groetzner, Patrick;Duer, Mirjam
通讯作者:
Duer, Mirjam