- #1
dirk_mec1
- 761
- 13
Homework Statement
http://img252.imageshack.us/img252/4844/56494936eo0.png
2. relevant equations
BL = bounded linear space (or all operators which are bounded).
The Attempt at a Solution
I got for the first part:
[tex]||A||_{BL} =||tf(t)||_{\infty} \leq ||f||_{\infty} [/tex] so
[tex] ||A||_{BL} \leq 1[/tex]
In second part I have to proof that: [tex] ||A||_{BL} \geq 1 [/tex] and thus the conclusion can be drawn.
But I'm stuck at how to use the fact that E is banach. (At least that's the one thing I haven't used yet so I presume I need it for the second part)
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