ON THE SPECTRUM OF SPECIAL CLASSES OF DOUBLY COMMUTING n −TUPLES OF OPERATORS. Iraqi Journal of Science, [S. l.], v. 53, n. 2, p. 386–392, 2024. DOI: 10.24996/. Disponível em: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/12718.. Acesso em: 22 nov. 2024.