Timeline for Lower bound of the expectation of the product of inner products of random vectors
Current License: CC BY-SA 4.0
9 events
| when toggle format | what | by | license | comment | |
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| Jun 8, 2019 at 6:18 | comment | added | Lwins | @AnthonyQuas Well, I once wanted to delete this question when Iosif pointed out the answer because that made me feel myself so stupid. :P | |
| Jun 8, 2019 at 6:15 | comment | added | Anthony Quas | Sorry. I had read it as taking values in $[-1,1]$, not ${-1,1}$. | |
| Jun 8, 2019 at 6:06 | comment | added | Lwins | @AnthonyQuas Note how we determine the r.v. $x$. It will always perpendicular to either $\alpha_1$ or $alpha_2$. | |
| Jun 8, 2019 at 3:53 | comment | added | Anthony Quas | I’m missing something here. If you take your $\alpha_1$ and $\alpha_2$, why is the expectation zero? It seems that you’re taking a product of non-negative numbers, and the product is only zero if $x$ is perpendicular to one of the $\alpha$’s, so the product is almost surely positive, and the expectation is positive. | |
| Jun 7, 2019 at 4:14 | history | edited | user64494 | CC BY-SA 4.0 |
The title is improved.
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| Jun 6, 2019 at 18:33 | vote | accept | Lwins | ||
| Jun 6, 2019 at 18:23 | answer | added | Iosif Pinelis | timeline score: 3 | |
| Jun 6, 2019 at 14:39 | history | edited | Lwins | CC BY-SA 4.0 |
added 323 characters in body
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| Jun 6, 2019 at 14:30 | history | asked | Lwins | CC BY-SA 4.0 |