On Copositive Approximation in Spaces of Continuous Functions I: The Alternation Property of Copositive Approximation. Analysis in Theory and Applications, [S. l.], v. 31, n. 4, p. 354–372, 2017. DOI: 10.4208/ata.2015.v31.n4.2. Disponível em: https://www.global-sci.com/index.php/ata/article/view/8068. Acesso em: 6 dec. 2025.