Variations of Weyl's tube formula
arXiv:2102.04305 · doi:10.1007/s12220-021-00707-z
Abstract
In 1939 Weyl showed that the volume of spherical tubes around compact submanifolds M of Euclidean space depends solely on the induced Riemannian metric on M. Can this intrinsic nature of the tube volume be preserved for tubes with more general cross sections D than the round ball? Under sufficiently strong symmetry conditions on D the answer turns out to be yes.
Added reference and Section 8