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arXiv 1602.06394math.DGmath.AP
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卵状体生长:二维时不变光滑形状的唯一性

Ooid growth: Uniqueness of time-invariant, smooth shapes in 2D

Andras A. Sipos

摘要:

研究了平面曲线在非局部几何方程下的演化问题。它模拟了地球科学中被称为ooids的碳酸盐颗粒的同时收缩和生长。使用经典的ODE结果和双射映射,我们证明了与物理环境相关的稳定参数确定一个独特的,时不变的,紧凑的形状之间的光滑,凸曲线嵌入$R^2$。同时也揭示了任何时不变解都具有$D_2$对称性。该模型的预测与自然界中观察到的卵形体形状非常一致。

英文摘要:

Evolution of planar curves under a nonlocal geometric equation is investigated. It models the simultaneous contraction and growth of carbonate particles called ooids in geosciences. Using classical ODE results and a bijective mapping we demonstrate that the steady parameters associated with the physical environment determine a unique, time-invariant, compact shape among smooth, convex curves embedded in $R^2$. It is also revealed that any time-invariant solution possesses $D_2$ symmetry. The model predictions remarkably agree with ooid shapes observed in nature.

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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