How well can an $n \times n$ matrix be approximated by reducible ones?
Herrero, Domingo A. ; Szarek, Stanislaw J.
Duke Math. J., Tome 53 (1986) no. 1, p. 233-248 / Harvested from Project Euclid
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Publié le : 1986-03-14
Classification:  47A55,  47A30 
@article{1077304892,
     author = {Herrero, Domingo A. and Szarek, Stanislaw J.},
     title = {How well can an $n \times n$ matrix be approximated by
 reducible ones?},
     journal = {Duke Math. J.},
     volume = {53},
     number = {1},
     year = {1986},
     pages = { 233-248},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1077304892}
}

Herrero, Domingo A.; Szarek, Stanislaw J. How well can an $n \times n$ matrix be approximated by
 reducible ones?. Duke Math. J., Tome 53 (1986) no. 1, pp.  233-248. http://gdmltest.u-ga.fr/item/1077304892/