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arXiv 1607.08705math.AG
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柱面上的非负多项式

Polynomials nonnegative on the cylinder

Claus Scheiderer, Sebastian Wenzel

摘要:

在2010年,马歇尔解决了带状猜想,根据该猜想,$\mathbb{R}[x,y]$中的每个多项式,在带状$[-1,1]\times\mathbb{R}$上非负,是平方和和平方乘以$1-x^2$。考虑$C$在$\mathbb{R}$上的仿射非奇异曲线,并研究了在$C(\mathbb{R})\times\mathbb{R}$上非负的$f$在$\mathbb{R}[C][y]$上的平方和问题.在$f$在$C(\mathbb{R})\times\mathbb{R}$中只有1/2个零的条件下,我们给出了肯定的回答。对于$C$是圆$x_1^2+x_2^2=1$,我们无条件地证明了这个结果.

英文摘要:

In 2010, Marshall settled the strip conjecture, according to which every polynomial in $\mathbb{R}[x,y]$, nonnegative on the strip $[-1,1]\times\mathbb{R}$, is a sum of squares and of squares times $1-x^2$. We consider affine nonsingular curves $C$ over $\mathbb{R}$ with $C(\mathbb{R})$ compact, and study the question whether every $f$ in $\mathbb{R}[C][y]$, nonnegative on $C(\mathbb{R})\times\mathbb{R}$, is a sum of squares in $\mathbb{R}[C][y]$. We give an affirmative answer under the condition that $f$ has only finitely many zeros in $C(\mathbb{R})\times\mathbb{R}$. For $C$ the circle $x_1^2+x_2^2=1$, we prove the result unconditionally.

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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