We give a lower bound for the minimal displacement characteristic in Hilbert spaces.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-sm165-3-2, author = {Emanuele Casini}, title = {Minimal displacement in Hilbert spaces}, journal = {Studia Mathematica}, volume = {162}, year = {2004}, pages = {215-219}, zbl = {1073.47521}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-sm165-3-2} }
Emanuele Casini. Minimal displacement in Hilbert spaces. Studia Mathematica, Tome 162 (2004) pp. 215-219. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-sm165-3-2/