Let X be an infinite-dimensional Banach space. The measure of solvability ν(I) of the identity operator I is equal to 1.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-ba52-2-8,
author = {D. Caponetti and G. Trombetta},
title = {A Note on the Measure of Solvability},
journal = {Bulletin of the Polish Academy of Sciences. Mathematics},
volume = {52},
year = {2004},
pages = {179-183},
zbl = {1115.47041},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-ba52-2-8}
}
D. Caponetti; G. Trombetta. A Note on the Measure of Solvability. Bulletin of the Polish Academy of Sciences. Mathematics, Tome 52 (2004) pp. 179-183. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-ba52-2-8/