Numerical Radius Inequalities Involving 2 × 2 Block Matrices. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 18, n. 1, p. 5597, 2025. DOI: 10.29020/nybg.ejpam.v18i1.5597. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/5597. Acesso em: 6 feb. 2025.