RT Journal Article T1 An elementary example of Sard's Theorem sharpness A1 Ferrera Cuesta, Juan AB In this note we define a C1 function F : [0, M] 2 → [0, 2] that satisfies that its set of critical values has positive measure. This function provides an example, easier than those that usually appear in the literature, of how the order of differentiability required in Sard’s Theorem cannot be improved. YR 2022 FD 2022-02-17 LK https://hdl.handle.net/20.500.14352/71710 UL https://hdl.handle.net/20.500.14352/71710 LA eng DS Docta Complutense RD 10 may 2025