In this paper the notion of the derivative of the norm of a linear mapping in a normed vector space is introduced. The fundamental properties of the derivative of the norm are established. Using these properties, linear differential equations in a Banach space are studied and lower and upper estimates of the norms of their solutions are derived.
@article{104503,
author = {Franti\v sek Tumajer},
title = {Derivative of the norm of a linear mapping and its application to differential equations},
journal = {Applications of Mathematics},
volume = {37},
year = {1992},
pages = {193-199},
zbl = {0767.34045},
mrnumber = {1157455},
language = {en},
url = {http://dml.mathdoc.fr/item/104503}
}
Tumajer, František. Derivative of the norm of a linear mapping and its application to differential equations. Applications of Mathematics, Tome 37 (1992) pp. 193-199. http://gdmltest.u-ga.fr/item/104503/
Foundations of the theory of functions and functional analysis, (Russian). Czech translation, Praha, 1975. (1975)
Foundations of modern analysis, Academic Press, New York-London, 1960; Russian translation, Mir, Moscow. (1960) | MR 0120319