Publicações
Artigos publicados
I. A. Ferra and G. Petronilho. Perturbations by lower order terms do not destroy the global hypoellipticity of certain systems of pseudodifferential operators defined on torus. Mathematische Nachrichten, 2023.
G. Araujo, I. A. Ferra and L. F. Ragognette . Global analytic hypoellipticity and solvability of certain operators subject to group actions. PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY, p. 4771-4783, 2022.
G. Araujo, I. A. Ferra and L. F. Ragognette. Global solvability and propagation of regularity of sums of squares on compact manifolds. JOURNAL D ANALYSE MATHEMATIQUE, 2022.
I. A. Ferra. Global Gevrey solvability for a class of perturbations of involutive systems. JOURNAL OF DIFFERENTIAL EQUATIONS, v. 270, p. 994-1018, 2021.
I. A Ferra, G. Petronilho and B. de Lessa Victor. Global M-Hypoellipticity, Global M-Solvability and Perturbations by Lower Order Ultradifferential Pseudodifferential Operators. JOURNAL OF FOURIER ANALYSIS AND APPLICATIONS, v. 26, p. 85, 2020.
R. F. Barostichi, I. A. Ferr and, G. Petronilho. Global hypoellipticity and simultaneous approximability in ultradifferentiable classes. JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS, v. 453, p. 104-124, 2017.
Artigos aceitos para publicação
Artigos submetidos
I. A. Ferra and G. Petronilho. On ultradifferentiable regularity of perturbations by lower order terms of globally Cinfty hypoelliptic ultradifferentiable pseudodifferential operators.
G. Araujo, I. A. Ferra and L. F. Ragognette. Global hypoellipticity of sums of squares on compact manifolds. Pré-print: https://arxiv.org/pdf/2005.04484.pdf
G. Araujo, I. A. Ferra, L. F. Ragognette, M. R. Jahnke. Global solvability and cohomology of tube structures on compact manifolds. Pré-print: https://arxiv.org/pdf/2304.10472.pdf