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A refined estimate for the topological degree. (arXiv:1710.02994v1 [math.AP])
来源于:arXiv
We sharpen an estimate of Bourgain, Brezis, and Nguyen for the topological
degree of continuous maps from a sphere $\mathbb{S}^d$ into itself in the case
$d \ge 2$. This provides the answer for $d \ge 2$ to a question raised by
Brezis. The problem is still open for $d=1$. 查看全文>>