Polynomial techniques for investigation of spherical designs

Authors:
Silvia Boumova;Peter Boyvalenkov;Hristina Kulina;Maya Stoyanova
Affiliations:
Institute of Mathematics and Informatics, Bulgarian Academy of Sciences, Sofia, Bulgaria 1113;Institute of Mathematics and Informatics, Bulgarian Academy of Sciences, Sofia, Bulgaria 1113;Faculty of Mathematics and Informatics, Plovdiv University, Plovdiv, Bulgaria 4003;Faculty of Mathematics and Informatics, Sofia University, Sofia, Bulgaria 1164
Venue:
Designs, Codes and Cryptography
Year:
2009

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Abstract

We investigate the structure of spherical 驴-designs by applying polynomial techniques for investigation of some inner products of such designs. Our approach can be used for large variety of parameters (dimension, cardinality, strength). We obtain new upper bounds for the largest inner product, lower bounds for the smallest inner product and some other bounds. Applications are shown for proving nonexistence results either in small dimensions and in certain asymptotic process. In particular, we complete the classification of the cardinalities for which 3-designs on $${\mathbb{S}^{n-1}}$$ exist for n = 8, 13, 14 and 18. We also obtain new asymptotic lower bound on the minimum possible odd cardinality of 3-designs.