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arXiv 1706.04604math.AGmath.AC
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偶数次的高阶三元形式

High-rank ternary forms of even degree

Alessandro De Paris

摘要:

我们展示,对于每个偶数度,严格大于的单项式的最大秩的三进制形式的秩。连同先前在奇数情况下的结果,这给出了$d\ge 2$的下界\[\operatorname{r_{max}}(3,d)\ge\left\lfloor\frac{d^2+2d+5}4\right\rfloor\],其中$\operatorname{r_{max}}(n,d)$表示在特征为零的代数闭域中系数为$n$的变量中度$d$形式的最大秩。

英文摘要:

We exhibit, for each even degree, a ternary form of rank strictly greater than the maximum rank of monomials. Together with an earlier result in the odd case, this gives the lower bound \[\operatorname{r_{max}}(3,d)\ge\left\lfloor\frac{d^2+2d+5}4\right\rfloor\] for $d\ge 2$, where $\operatorname{r_{max}}(n,d)$ denotes the maximum rank of degree $d$ forms in $n$ variables with coefficients in an algebraically closed field of characteristic zero.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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