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arXiv 2107.04112math.MGcs.CG
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常曲率曲面的迭代中间三角形细分

Iterated Medial Triangle Subdivision in Surfaces of Constant Curvature

Florestan Brunck

摘要:

考虑常曲率曲面上的测地线三角形,通过连接其边的中点将其递归地细分为4个三角形。我们证明了一个均匀的$δ>0$的存在,这样,在任何一步的细分,所有的三角形的角度都位于区间$(δ, π-δ)$。此外,我们表现出稳定行为的角度和长度,因为这种细分的进展。

英文摘要:

Consider a geodesic triangle on a surface of constant curvature and subdivide it recursively into 4 triangles by joining the midpoints of its edges. We show the existence of a uniform $δ>0$ such that, at any step of the subdivision, all the triangle angles lie in the interval $(δ, π-δ)$. Additionally, we exhibit stabilising behaviours for both angles and lengths as this subdivision progresses.

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