2021-01-042021-01-042005-01ASSEM, I.; CASTONGUAY, D.; MARCOS, E. N.; TREPODE, S. Strongly simply connected schurian algebras and multiplicative bases. Journal of Algebra, Amsterdã, v. 283, n. 1, p. 161-189, Jan. 2005.e- 0021-8693http://repositorio.bc.ufg.br/handle/ri/19278In this paper, we define concepts of crowns and quasi-crowns, valid in an arbitrary schurian algebra, and which generalise the corresponding concepts in an incidence algebra. We show first that a triangular schurian algebra is strongly simply connected if and only if it is simply connected and contains no quasi-crown. We then prove that the absence of quasi-crowns in a triangular schurian algebra implies the existence of a multiplicative basis.engAcesso AbertoArtigo10.1016/j.jalgebra.2004.08.020