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THE FINITE SUBSETS OF Z2 HAVING THE EXTENSION PROPERTY
Published online by Cambridge University Press: 13 February 2001
Abstract
The paper considers finite subsets Λ ⊂ Zd which possess the extension property, namely that every collection {ck}k∈Λ−Λ of complex numbers which is positive definite with respect to Λ is the restriction of the Fourier coefficients of some positive measure on Td. All finite subsets of Z2 which possess the extension property are described.
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- Research Article
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- The London Mathematical Society 2000
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