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Strictly positive definite functions on spheres

Authors: Yuan Xu and E. W. Cheney
Journal: Proc. Amer. Math. Soc. 116 (1992), 977-981
MSC: Primary 43A35
MathSciNet review: 1096214
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Abstract: A sufficient condition is given for the strict positive-definiteness of a real, continuous function on the $ m$-dimensional sphere.

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