Geodesic
Fourier Transform of Unbounded Measures on Hypergroups
Bollettino della Unione matematica italiana, Série 8, 10B (2007) no. 3, pp. 819-828.

Voir la notice de l'article provenant de la source Biblioteca Digitale Italiana di Matematica

We show that an unbounded measure on a strong commutative hypergroup is transformable if and only if its convolution with any positive definite function of compact support is positive definite.
Proviamo che una misura illimitata su un ipergruppo fortemente commutativo è trasformabile se e solo se la sua convoluzione con una qualunque funzione definita positiva a supporto compatto è definita positiva. 
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Amini, Massoud. Fourier Transform of Unbounded Measures on Hypergroups. Bollettino della Unione matematica italiana, Série 8, 10B (2007) no. 3, pp. 819-828. http://geodesic.mathdoc.fr/item/BUMI_2007_8_10B_3_a24/

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