- #1

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Im pretty sure such an operator exists since the open mapping theorem requires surjectivity and not just dense range, but its just bothering me that I can't find an example.

- Thread starter ak416
- Start date

- #1

- 122

- 0

Im pretty sure such an operator exists since the open mapping theorem requires surjectivity and not just dense range, but its just bothering me that I can't find an example.

- #2

- 1

- 0

(a_n) -> \sum a_n \exp( \sqrt{-1} n x)

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