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arXiv 0906.5290math.DGmath.OC
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极小长度和曲率的平面曲线的存在性

Existence of planar curves minimizing length and curvature

Ugo Boscain, Grégoire Charlot, Francesco Rossi

摘要:

在本文中,我们考虑的问题是部分隐藏或损坏的曲线最小化的功能$\int \sqrt{1+K_γ^2} ds$,取决于长度和曲率$K$的重建。我们确定起点和终点以及初始和最终方向。对于这个泛函,我们讨论了各种泛函空间上极小解的存在性问题。我们发现不存在极小的情况下,在初始和最终方向被认为是与方向。在这种情况下,最小化轨迹序列可以收敛到具有角度的曲线。相反,我们证明存在的“时间重新参数化”的功能$$\int \| \dotγ(t) \|\sqrt{1+K_\ga^2} dt$$的所有边界条件下,如果初始和最终的方向被认为是无关的方向极小。在这种情况下,极小化器可以呈现尖点(最多两个),但不能呈现角度。

英文摘要:

In this paper we consider the problem of reconstructing a curve that is partially hidden or corrupted by minimizing the functional $\int \sqrt{1+K_γ^2} ds$, depending both on length and curvature $K$. We fix starting and ending points as well as initial and final directions. For this functional we discuss the problem of existence of minimizers on various functional spaces. We find non-existence of minimizers in cases in which initial and final directions are considered with orientation. In this case, minimizing sequences of trajectories can converge to curves with angles. We instead prove existence of minimizers for the "time-reparameterized" functional $$\int \| \dotγ(t) \|\sqrt{1+K_\ga^2} dt$$ for all boundary conditions if initial and final directions are considered regardless to orientation. In this case, minimizers can present cusps (at most two) but not angles.

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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