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入射旗的多项式族与显式非对角 Ramsey 图

Polynomial families of incident flags and explicit off-diagonal Ramsey graphs

Brecht Verbeken

arXiv 2610.06081首次发表:更新:

发表机构

Vrije Universiteit Brussel; imec-SMIT(布鲁塞尔自由大学; imec-SMIT)

机构由 AI 辅助整理,请以论文原文为准。

AI 中文总结

本文从多项式族构造显式非对角 Ramsey 图,通过插值和标量限制得到指数界,并给出确定性多项式时间算法。

AI 中文摘要

我们从入射点-超平面旗的多项式族构造显式非对角 Ramsey 图。通用插值将有序团配置的精确维数转化为其系数-标签关联上的界。在临界维数,一个多项式将禁止对图像与其对角线分离;删除相应边保留三角秩证书。标量限制实现有理端点而无舍入损失。所得固定-$s$ 指数具有前导尺度 $s/(2\log_2s)$,短 Frobenius 关系给出显式例子 $R(16,t)\ge\Omega(t^{2.0539221767\ldots})$。有限纤维构造给出范围 $s^2(\log s)^2=o(\log t)$。对于固定参数,代数预处理终止,域初始化、顶点解码和邻接判定在扩展度上取确定性多项式时间。我们还保留一个无消去变体,并为具有显著边的通用禁止配置表述过滤论证。

英文摘要

We construct explicit off-diagonal Ramsey graphs from polynomial families of incident point--hyperplane flags. Universal interpolation translates the exact dimension of ordered clique configurations into a bound on their coefficient--label incidence. At the critical dimension, a polynomial separates the forbidden-pair image from its diagonal; deleting the corresponding edges preserves a triangular rank certificate. Restriction of scalars realizes the rational endpoint without rounding loss. The resulting fixed-$s$ exponent has leading scale $s/(2\log_2s)$, and short Frobenius relations give the explicit example $R(16,t)\geΩ(t^{2.0539221767\ldots})$. A finite-fiber construction gives the range $s^2(\log s)^2=o(\log t)$. For fixed parameters, algebraic preprocessing terminates and field initialization, vertex decoding and adjacency take deterministic time polynomial in the extension degree. We also retain an elimination-free variant and formulate the filtering argument for general forbidden configurations with a distinguished edge.

Comments27 pages, 1 table

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