Abstract The multipole expansion can be formulated in spherical and Cartesian coordinates. By constructing an explicit map linking both formulations in isotropic media. we discover a lack of equivalence between them in anisotropic media. In isotropic media. https://www.diegojavierfares.com/mega-choice-Seattle-Seahawks-NFL-Printed-Camo-Socks-p11205-top-buy/