CHIAPPINELLI, R. Rayleigh Quotient and Surjectivity of Nonlinear Operators in Hilbert space. Annals of Mathematics and Physics, [S. l.], p. 277–278, 2024. DOI: 10.17352/amp.000132. Disponível em: https://www.peertechzpublications.us/amp/article/view/AMP-7-232. Acesso em: 11 jan. 2025.