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Communications in Mathematical Sciences
Volume 21 (2023)
Number 5
A quantitative version of the transversality theorem
Pages: 1303 – 1320
DOI: https://dx.doi.org/10.4310/CMS.2023.v21.n5.a5
Authors
Abstract
The present paper studies a quantitative version of the transversality theorem. More precisely, given a continuous function $g \in \mathcal{C} {(\lbrace 0,1 \rbrace}^d , \mathbb{R}^m)$ and a global smooth manifold $W \subset \mathbb{R}^m)$ of dimension $p$, we establish a quantitative estimate on the $(d+p-m)$-dimensional Hausdorff measure of the set $\mathcal{Z}^g_W = {\lbrace x \in {(\lbrace 0,1 \rbrace}^d : g(x) \in W \rbrace}$. The obtained result is applied to quantify the total number of shock curves in weak entropy solutions to scalar conservation laws with uniformly convex fluxes in one space dimension.
Keywords
transversality lemma, quantitative estimates, conservation laws
2010 Mathematics Subject Classification
35L67, 46T20
Dedicated to Professor Duong Minh Duc on the occasion of his 70th birthday
Received 21 December 2021
Received revised 26 August 2022
Accepted 30 September 2022
Published 30 August 2023