bounded linear operator is a linear transformation L between normed vector spaces X and Y for which the ratio of the norm of L(v) to that of v is bounded by the same number, over all non-zero vectors v in X. In other words, there exists some M > 0 such that for all v in X,
The smallest such M is called the operator norm of L.
J. Dieudonné History of Functional Analysis
North Holland | 1983-01-01 | ISBN: 0444861483 | 312 pages | Djvu | 2,3 MB
North-Holland Mathematics Studies