TY - JOUR AU - Thierry De Pauw TI - Density estimate from below in relation to a conjecture of A. Zygmund on Lipschitz differentiation JO - Journal de l’École polytechnique — Mathématiques PY - 2022 SP - 1473 EP - 1512 VL - 9 PB - École polytechnique UR - https://jep.centre-mersenne.org/articles/10.5802/jep.211/ DO - 10.5802/jep.211 LA - en ID - JEP_2022__9__1473_0 ER -