CHIAPPINELLI, R. Rayleigh Quotient and Surjectivity of Nonlinear Operators in Hilbert space. Annals of Mathematics and Physics, [S. l.], v. 7, n. 3, p. 277–278, 2024. DOI: 10.17352/amp.000132. Disponível em: https://www.mathematicsgroup.com/amp/article/view/AMP-7-232. Acesso em: 28 aug. 2025.