Timeline for $B _{\ell ^{2}} ^{+}$ with the norm $\lVert\lvert \cdot \rvert\rVert _{\sqrt{2}}$ doesn't have normal structure
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
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| Feb 13, 2019 at 4:46 | comment | added | G. P | thanks for help me :) | |
| Feb 12, 2019 at 23:42 | vote | accept | G. P | ||
| Jan 29, 2019 at 8:59 | comment | added | Vincent | So in order to have $diam(B) = r_x(B)$ we need that $diam(B) = \sqrt{2}$ as well and not 1 as the OP states. Now Nick Weavers example in the comments to the OP is interesting in the context, because by exhibiting two elements $x, y$ that are $\sqrt{2}$ apart he shows that indeed we have $diam(B) \geq \sqrt{2}$. | |
| Jan 5, 2019 at 21:49 | history | edited | Pietro Majer | CC BY-SA 4.0 |
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| Jan 5, 2019 at 18:51 | history | answered | Pietro Majer | CC BY-SA 4.0 |