Three Fisher-Rao Identities on the Binary Statistical Manifold: Jeffreys Uniqueness, the Gudermannian Bridge, and Isotropic Retention. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 19, n. 2, p. 7819, 2026. DOI: 10.29020/nybg.ejpam.v19i2.7819. Disponível em: https://www.ejpam.com/ejpam/article/view/7819. Acesso em: 28 jul. 2026.