TY - JOUR AU - Janin Jäger TI - A Note on the Derivatives of Isotropic Positive Definite Functions on the Hilbert Sphere JO - Symmetry, integrability and geometry: methods and applications PY - 2019 VL - 15 UR - http://geodesic.mathdoc.fr/item/SIGMA_2019_15_a80/ LA - en ID - SIGMA_2019_15_a80 ER -