ALGEBRAIC COMBINATORICS

no. 2
Explicit spherical designs
Xiang, Ziqing1
1 Department of Mathematics, University of Georgia
Algebraic Combinatorics, Volume 5 (2022) no. 2, pp. 347-369.

Since the introduction of the notion of spherical designs by Delsarte, Goethals, and Seidel in 1977, finding explicit constructions of spherical designs had been an open problem. Most existence proofs of spherical designs rely on the topology of the spheres, hence their constructive versions are only computable, but not explicit. That is to say that these constructions can only give algorithms that produce approximations of spherical designs up to arbitrary given precision, while they are not able to give any spherical designs explicitly. Inspired by recent work on rational designs, i.e. designs consisting of rational points, we generalize the known construction of spherical designs that uses interval designs with Gegenbauer weights, and give an explicit formula of spherical designs of arbitrary given strength on the real unit sphere of arbitrary given dimension.

Received:
Revised:
Accepted:
Published online:
DOI: 10.5802/alco.213
Classification: 05B30
Keywords: Explicit construction, rational points, spherical designs.
Xiang, Ziqing 1

1 Department of Mathematics, University of Georgia
License: CC-BY 4.0
Copyrights: The authors retain unrestricted copyrights and publishing rights 
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Xiang, Ziqing. Explicit spherical designs. Algebraic Combinatorics, Volume 5 (2022) no. 2, pp. 347-369. doi : 10.5802/alco.213. https://alco.centre-mersenne.org/articles/10.5802/alco.213/

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