G Goldman, Y Yomdin - … Geometry, Haifa, Israel, May 10-13, 2023, 2024 - books.google.com
Abstract Let f: B"→ R be ad+ 1 times continuously differentiable function on the unit ball B",
with maxze B"| f (z)|= 1. A well-known fact is that if f vanishes on a set ZCB" with a non-empty …