Asymptotic analysis for non-local curvature flows for plane curves with a general rotation number

Takeyuki Nagasawa; Kohei Nakamura; Takeyuki Nagasawa; Kohei Nakamura

doi:10.3934/mine.2021047

Mathematics in Engineering

2021, Volume 3, Issue 6: 1-26. doi: 10.3934/mine.2021047

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Asymptotic analysis for non-local curvature flows for plane curves with a general rotation number

Takeyuki Nagasawa ^,,
Kohei Nakamura

Graduate School of Science and Engineering, Saitama University, Japan

Received: 13 March 2020 Accepted: 25 December 2020 Published: 14 January 2021

Several non-local curvature flows for plane curves with a general rotation number are discussed in this work. The types of flows include the area-preserving flow and the length-preserving flow. We have a relatively good understanding of these flows for plane curves with the rotation number one. In particular, when the initial curve is strictly convex, the flow exists globally in time, and converges to a circle as time tends to infinity. Even if the initial curve is not strictly convex, a global solution, if it exists, converges to a circle. Here, we deal with curves with a general rotation number, and show, not only a similar result for global solutions, but also a blow-up criterion, upper estimates of the blow-up time, and blow-up rate from below. For this purpose, we use a geometric quantity which has never been considered before.
- non-local curvature flow,
- rotation number,
- blow-up,
- asymptotic behavior,
- the isoperimetric inequality,
- the isoperimetric deficit
Citation: Takeyuki Nagasawa, Kohei Nakamura. Asymptotic analysis for non-local curvature flows for plane curves with a general rotation number[J]. Mathematics in Engineering, 2021, 3(6): 1-26. doi: 10.3934/mine.2021047

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Abstract

Several non-local curvature flows for plane curves with a general rotation number are discussed in this work. The types of flows include the area-preserving flow and the length-preserving flow. We have a relatively good understanding of these flows for plane curves with the rotation number one. In particular, when the initial curve is strictly convex, the flow exists globally in time, and converges to a circle as time tends to infinity. Even if the initial curve is not strictly convex, a global solution, if it exists, converges to a circle. Here, we deal with curves with a general rotation number, and show, not only a similar result for global solutions, but also a blow-up criterion, upper estimates of the blow-up time, and blow-up rate from below. For this purpose, we use a geometric quantity which has never been considered before.

References

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