Heisenberg 群中低余维的 $C^{1,α}$-可整流性
$C^{1,α}$-rectifiability in low codimension in Heisenberg groups
AI总结:
本文为 Heisenberg 群子集引入高阶可整流性概念,并证明低余维子集几乎处处存在近似切抛物面是其具备 $C^{1,α}$-可整流性的充分条件。
摘要:
为 Heisenberg 群 $\mathbb{H}^n$ 的子集引入了高阶可整流性的自然概念,即对某个 $0 < α\leq 1$,通过 $(\mathbf{C}_H^{1,α},\mathbb{H})$-正则曲面的可数并几乎处处覆盖该集合。我们证明,Heisenberg 群中低余维子集具备 $C^{1,α}$-可整流性的充分条件是几乎处处存在合适的近似切抛物面。
英文摘要:
A natural notion of higher order rectifiability is introduced for subsets of Heisenberg groups $\mathbb{H}^n$ in terms of covering a set almost everywhere by a countable union of $(\mathbf{C}_H^{1,α},\mathbb{H})$-regular surfaces, for some $0 < α\leq 1$. We prove that a sufficient condition for $C^{1,α}$-rectifiability of low-codimensional subsets in Heisenberg groups is the almost everywhere existence of suitable approximate tangent paraboloids.
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