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- W4286902373 abstract "In this paper, we address the problem of constructing $C^2$ cubic spline functions on a given arbitrary triangulation $mathcal{T}$. To this end, we endow every triangle of $mathcal{T}$ with a Wang-Shi macro-structure. The $C^2$ cubic space on such a refined triangulation has a stable dimension and optimal approximation power. Moreover, any spline function in such space can be locally built on each of the macro-triangles independently via Hermite interpolation. We provide a simplex spline basis for the space of $C^2$ cubics defined on a single macro-triangle which behaves like a Bernstein/B-spline basis over the triangle. The basis functions inherit recurrence relations and differentiation formulas from the simplex spline construction, they form a nonnegative partition of unity, they admit simple conditions for $C^2$ joins across the edges of neighboring triangles, and they enjoy a Marsden-like identity. Also, there is a single control net to facilitate control and early visualization of a spline function over the macro-triangle. Thanks to these properties, the complex geometry of the Wang-Shi macro-structure is transparent to the user. Stable global bases for the full space of $C^2$ cubics on the Wang-Shi refined triangulation $mathcal{T}$ are deduced from the local simplex spline basis by extending the concept of minimal determining sets." @default.
- W4286902373 created "2022-07-25" @default.
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- W4286902373 date "2021-10-15" @default.
- W4286902373 modified "2023-10-16" @default.
- W4286902373 title "Construction of $C^2$ cubic splines on arbitrary triangulations" @default.
- W4286902373 doi "https://doi.org/10.48550/arxiv.2110.07907" @default.
- W4286902373 hasPublicationYear "2021" @default.
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