- #1

- 1

- 0

## Main Question or Discussion Point

Hi, if I know that A is continuous and linear and A*A is compact, where A* is the adjungate, how will I show that A has to be compact?

- Thread starter elina
- Start date

- #1

- 1

- 0

Hi, if I know that A is continuous and linear and A*A is compact, where A* is the adjungate, how will I show that A has to be compact?

- #2

- 533

- 5

You could try using the http://en.wikipedia.org/wiki/Polar_decomposition" [Broken].

Last edited by a moderator:

- Last Post

- Replies
- 8

- Views
- 5K

- Last Post

- Replies
- 6

- Views
- 2K

- Last Post

- Replies
- 3

- Views
- 2K

- Replies
- 4

- Views
- 14K

- Last Post

- Replies
- 1

- Views
- 2K

- Last Post

- Replies
- 3

- Views
- 1K

- Last Post

- Replies
- 2

- Views
- 2K

- Replies
- 2

- Views
- 7K