%0 Journal Article %A Janin Jäger %T A Note on the Derivatives of Isotropic Positive Definite Functions on the Hilbert Sphere %J Symmetry, integrability and geometry: methods and applications %D 2019 %V 15 %U http://geodesic.mathdoc.fr/item/SIGMA_2019_15_a80/ %G en %F SIGMA_2019_15_a80