Timeline for Sums over products over short paths in an expander graph
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
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| Aug 23, 2020 at 21:34 | answer | added | Narutaka OZAWA | timeline score: 3 | |
| Aug 18, 2020 at 3:00 | comment | added | Narutaka OZAWA | Let's begin with the trivial upper bound $$|\sum f(v_1)f(v_2)f(v_3)|=|\sum_{v_2} (Af)(v_2)f(v_2)(Af)(v_2)| \le \|f\|_\infty\|Af\|_2^2,$$ where $(Af)(v)=\sum_{w: \{w,v\}\in E}f(v)$. | |
| Aug 17, 2020 at 9:33 | history | edited | H A Helfgott |
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| Aug 17, 2020 at 8:30 | history | edited | H A Helfgott | CC BY-SA 4.0 |
added 15 characters in body
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| Aug 17, 2020 at 8:19 | history | asked | H A Helfgott | CC BY-SA 4.0 |