The Convexity of a Fully Nonlinear Operator and Its Related Eigenvalue Problem. Journal of Mathematical Study, [S. l.], v. 52, n. 1, p. 75–97, 2019. DOI: 10.4208/jms.v52n1.19.07. Disponível em: https://www.global-sci.com/index.php/jms/article/view/13340. Acesso em: 6 dec. 2025.