Citations:submersive


 * 2010 Masahiro Shiota, "Triangulations of non-proper semialgebraic Thom maps" arxiv
 * If r is larger than one, Cr tube at a Cr manifold M of Rn is a triple T = (|T|, π, ρ), where |T| is an open neighborhood of M in Rn, π : |T| → M is a submersive Cr retraction and ρ is a non-negative Cr function on |T| such that ρ-1(0) = M and each point x on M is a unique and non-degenerate critical point of ρ|π-1(x).