Fernández, MarisaMuñoz, VicenteKowalski, OldrichMusso, EmilioPerrone, Domenico2023-06-202023-06-202005978-0-8176-3850-410.1007/0-8176-4424-5_8https://hdl.handle.net/20.500.14352/53236We show that there exist non-formal compact oriented manifolds of dimension n and with first Betti number b 1 = b ≥ 0 if and only if n ≥ 3 and b ≥ 2, or n ≥ (7 − 2b) and 0 ≤ b ≤ 2. Moreover, we present explicit examples for each one of these cases.engbook parthttp://link.springer.com/chapter/10.1007%2F0-8176-4424-5_8http://link.springer.comhttp://arxiv.org/pdf/math/0404527v2.pdfopen access514Real homotopyFormal manifoldsMassey productsGeometría1204 Geometría