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On the existence and estimates of nested spherical designs (2405.10607v1)
Published 17 May 2024 in math.FA and math.CO
Abstract: In this paper, we prove the existence of a spherical $t$-design formed by adding extra points to an arbitrarily given point set on the sphere and, subsequently, deduce the existence of nested spherical designs. Estimates on the number of required points are also given. For the case that the given point set is a spherical $t_1$-design such that $t_1 < t$ and the number of points is of optimal order $t_1d$, we show that the upper bound of the total number of extra points and given points for forming nested spherical $t$-design is of order $t{2d+1}$. A brief discussion concerning the optimal order in nested spherical designs is also given.
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