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arXiv 1004.3904math.AG
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关于判别式的一个注记

A note on the discriminant

Arkadiusz Pĺoski

摘要:

设$F(X,Y)=Y^d+a_1(X)Y^{d-1}+...+a_d(X)$是以$n+1$为变量$(X,Y)=(X_1,...,X_n,Y)$的多项式,其系数在代数闭域K中。假设判别式$D(X)=\disc_Y F(X,Y)$非零,我们研究$P\in K^n$的阶数$\ord_P D$。作为应用,我们得到了超曲面F=0非奇异的一个判别准则.

英文摘要:

Let $F(X,Y)=Y^d+a_1(X)Y^{d-1}+...+a_d(X)$ be a polynomial in $n+1$ variables $(X,Y)=(X_1,...,X_n,Y)$ with coefficients in an algebraically closed field K. Assuming that the discriminant $D(X)=\disc_Y F(X,Y)$ is nonzero we investigate the order $\ord_P D$ for $P\in K^n$. As application we get a discriminant criterion for the hypersurface F=0 to be nonsingular.

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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