Geodesic
\(I\)-sets and cominimal projections
Commentationes Mathematicae, Tome 46 (2006) no. 1, pp. 37-62.

Voir la notice de l'article provenant de la source Annales Societatis Mathematicae Polonae Series

Let \(Y \subset l^n_\infty\) be a subspace of codimension two. For \(n = 4\) the formula for cominimal projections will be presented. For \(n = 5\) the complete characterization of \(I\)-sets which determined cominimal projections and consequently the manner of finding cominimal projections will be given. This completes the results from [15].
DOI : 10.14708/cm.v46i1.5207
Mots-clés : projections, subspaces equivalent up to isometry, strongly unique best approximation, extreme points, regular \(I\)-sets, projections determined by \(I\)-set, cominimal projections 
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Agnieszka Lipieta. \(I\)-sets and cominimal projections. Commentationes Mathematicae, Tome 46 (2006) no. 1, pp.  37-62. doi : 10.14708/cm.v46i1.5207. http://geodesic.mathdoc.fr/articles/10.14708/cm.v46i1.5207/

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