Tight coefficients of averaged operators via scaled relative graph
Tight coefficients of averaged operators via scaled relative graph
复制标题
通过缩放相对图计算平均算子的紧系数
DOI:
10.1016/j.jmaa.2020.124211
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发表时间:
2020
影响因子:
1.3
通讯作者:
Yin, Wotao
中科院分区:
文献类型:
--
作者:
Huang, Xinmeng;Ryu, Ernest K.;Yin, Wotao
Many iterative methods in optimization are fixed-point iterations with averaged operators. As such methods converge at an O (1/k) rate with the constant determined by the averagedness coefficient, establishing small averagedness coefficients for operators is of broad interest. In this paper, we show that the averagedness coefficients of the composition of averaged operators by Ogura and Yamada (2002)[21] and the three-operator splitting by Davis and Yin (2017)[9] are tight. The analysis relies on the scaled relative graph, a geometric tool recently proposed by Ryu et al.(2019)[25].
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影响因子:
--
作者:
R. Farouki;H. Pottmann
通讯作者:
H. Pottmann
DOI:
--
发表时间:
1994
期刊:
影响因子:
--
作者:
Boris Polyak;P. Scherbakov;Sergei Shmulyian
通讯作者:
Sergei Shmulyian
DOI:
--
发表时间:
1952
期刊:
影响因子:
--
作者:
J. Coolidge
通讯作者:
J. Coolidge
DOI:
--
发表时间:
1980
期刊:
影响因子:
--
作者:
M. Hauenschild
通讯作者:
M. Hauenschild
DOI:
--
发表时间:
2018
期刊:
Geometry of Curves
影响因子:
--
作者:
Patrick J. Leman;M. Cinnirella
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M. Cinnirella