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feat(combinatorics/additive/ruzsa_szemeredi): The Ruzsa-Szemerédi problem #15335

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@YaelDillies YaelDillies commented Jul 14, 2022

Prove the lower bound on the Ruzsa-Szemerédi problem, in implicit, explicit and asymptotic form.


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@YaelDillies YaelDillies added the awaiting-review The author would like community review of the PR label Jul 14, 2022
@YaelDillies YaelDillies requested a review from kmill July 14, 2022 08:56
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ericrbg commented Aug 5, 2022

should this prove the explicit bound now?

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Yes, but I'm not sure how to state it. The problem is that the explicit bound would need to quantify over all graphs over a certain size, hence over types. Further, the construction in this PR only gives graphs with a number of vertices divisible by 6, so we would get an explicit only on a sixth of the values (ven if that's mathematically irrelevant).

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@b-mehta b-mehta added WIP Work in progress and removed awaiting-review The author would like community review of the PR labels Aug 13, 2022
@YaelDillies YaelDillies requested a review from a team as a code owner June 18, 2023 09:38
@github-actions github-actions bot added the modifies-synchronized-file This PR touches a files that has already been ported to mathlib4, and may need a synchronization PR. label Jun 18, 2023
@YaelDillies YaelDillies added awaiting-review The author would like community review of the PR blocked-by-other-PR This PR depends on another PR which is still in the queue. A bot manages this label via PR comment. t-combinatorics Combinatorics and removed WIP Work in progress labels Jun 18, 2023
@kim-em kim-em added the not-too-late This PR was ready at the point mathlib3 was frozen: we will try to merge it and port it to mathlib4 label Jul 16, 2023
@mathlib-dependent-issues-bot mathlib-dependent-issues-bot removed the blocked-by-other-PR This PR depends on another PR which is still in the queue. A bot manages this label via PR comment. label Nov 18, 2023
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Ported to LeanCamCombi

@YaelDillies YaelDillies deleted the ruzsa_szemeredi branch November 18, 2023 12:13
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