Some Results on Absolute Projection Constants
Some Results on Absolute Projection Constants
复制标题
关于绝对投影常数的一些结果
DOI:
10.1080/01630563.2018.1486327
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发表时间:
2019
影响因子:
1.2
通讯作者:
Alberto Martín
中科院分区:
文献类型:
--
作者:
A. Castejón;G. Lewicki;Alberto Martín
Abstract Let V be an n-dimensional real or complex Banach space and let denote its absolute projection constant. For any define In this article, we determine, in the complex case, minimal projections with respect to l1-norm as well as with respect to -norm for subspaces given by solutions of certain extremal problems. As an application we show that for any , there exists an n-dimensional subspace such that This generalizes the results from Castejon and Lewicki (2014) obtained in the real case.