Empirical instability strip for classical Cepheids - I. The Large Magellanic Cloud galaxy F. Espinoza-Arancibia, B. Pilecki, G. Pietrzyński, R. Smolec and P. Kervella A&A, 682 (2024) A185 Published online: 26 February 2024 DOI: 10.1051/0004-6361/202347804