Ladra González, ManuelPérez Rodríguez, Andrés2026-05-072026-05-072025-11-28Ladra, M., & Pérez-Rodríguez, A. (2025) Regular evolution algebras areclosed undersubalgebras, Comptes Rendus Mathématique, 363, 1461-1465. http://creativecommons.org/licenses/by/4.0/https://hdl.handle.net/10347/47155The main goal of this note is to show that subalgebras of regular evolution algebras are themselves evolution algebras. This allows us to assume, without loss of generality, that every subalgebra in the regular setting has a basis consisting of vectors with disjoint supports. Finally, we use this result to characterise the existence of codimension-one subalgebras in regular evolution algebras.engThis article is licensed under the Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/Evolution algebrasRegular evolution algebrasSubalgebrasjournal article10.48550/arXiv.2503.071871778-3569open access