Timeline for How to prove a unit norm matrix is the average of two unitary matrix
Current License: CC BY-SA 3.0
11 events
| when toggle format | what | by | license | comment | |
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| Sep 11, 2013 at 13:51 | history | edited | yaoxiao | CC BY-SA 3.0 |
added 43 characters in body
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| Jan 6, 2011 at 21:14 | comment | added | Andrés E. Caicedo | @Anton: Hehe. I see... | |
| Jan 6, 2011 at 17:43 | comment | added | Anton Geraschenko | I'm now convinced that this is indeed the original content, and that the question was entirely contained in the title. There's nothing to roll back to. | |
| Jan 6, 2011 at 17:33 | comment | added | Anton Geraschenko | This is really weird. Where IS the original content? How is it not in the revision history? | |
| Jan 6, 2011 at 17:15 | comment | added | Andrés E. Caicedo | Moderators: Please rollback to the original statement of the question! | |
| Jan 2, 2011 at 21:41 | comment | added | Yemon Choi | Further to Peter Shor's comment: mathoverflow.net/howtoask | |
| Jan 2, 2011 at 19:41 | answer | added | Mikael de la Salle | timeline score: 15 | |
| Jan 2, 2011 at 18:24 | comment | added | Peter Shor | I think the only norm where this question makes sense is the spectral norm. I see the votes to close piling up, but since nobody has jumped in and said that this is a well-known elementary fact, I think if you add some details to your question, and flag it to be reopened, it probably will be. There's an easy proof for 2 dimensions and the spectral norm. My first reaction is that I wouldn't think it would be true for arbitrarily many dimensions, and the spectral norm, but I could easily be wrong. | |
| Jan 2, 2011 at 17:55 | comment | added | Peter Shor | Do you know this is true? How many dimensions are you working in? | |
| Jan 2, 2011 at 17:49 | comment | added | Igor Rivin | which norm is unit? | |
| Jan 2, 2011 at 17:35 | history | asked | yaoxiao | CC BY-SA 2.5 |