Abstract
Let E, E 1 be two Banach spaces and 0 ≤ ε < 1. We say a mapping \( T \in \mathbb{B}(E,E_1 ) \) is “ε—isometric” or “ε—almost isometric” if
for all x ∈ E. We say T is “isometric“ if we can take ε = 0.
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© 1996 Kluwer Academic Publishers
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Ding, G. (1996). Topics on the Approximation Problem of Almost Isometric Operators by Isometric Operators. In: Li, B., Wang, S., Yan, S., Yang, CC. (eds) Functional Analysis in China. Mathematics and Its Applications, vol 356. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0185-8_2
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DOI: https://doi.org/10.1007/978-94-009-0185-8_2
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