We hereby certify that, Alexei Mailybaev, Instituto Nacional de Matemática Pura e Aplicada, participated in the Workshop on Simulation of Complex Processes in Porous Media, held at Instituto Nacional de Matemática Pura e Aplicada – IMPA, Rio de Janeiro, from September 25 to 26, 2015. Rio de Janeiro, September 26, 2015. Alexei Mailybaev Organizing Committee We hereby certify that, Antoine Tambue, Univ. of Cape Town, participated in the Workshop on Simulation of Complex Processes in Porous Media, held at Instituto Nacional de Matemática Pura e Aplicada – IMPA, Rio de Janeiro, from September 25 to 26, 2015. Rio de Janeiro, September 26, 2015. Alexei Mailybaev Organizing Committee We hereby certify that, Dan Marchesin, Instituto Nacional de Matemática Pura e Aplicada, participated in the Workshop on Simulation of Complex Processes in Porous Media, held at Instituto Nacional de Matemática Pura e Aplicada – IMPA, Rio de Janeiro, from September 25 to 26, 2015. Rio de Janeiro, September 26, 2015. Alexei Mailybaev Organizing Committee We hereby certify that, Jan Martin Nordbotten, University of Bergen, participated in the Workshop on Simulation of Complex Processes in Porous Media, held at Instituto Nacional de Matemática Pura e Aplicada – IMPA, Rio de Janeiro, from September 25 to 26, 2015. Rio de Janeiro, September 26, 2015. Alexei Mailybaev Organizing Committee We hereby certify that, Jhabriel Varela, Universidad Paraguayo Alemana, participated in the Workshop on Simulation of Complex Processes in Porous Media, held at Instituto Nacional de Matemática Pura e Aplicada – IMPA, Rio de Janeiro, from September 25 to 26, 2015. Rio de Janeiro, September 26, 2015. Alexei Mailybaev Organizing Committee We hereby certify that, Juan Galvis, Universidad Nacional de Colombia, participated in the Workshop on Simulation of Complex Processes in Porous Media, held at Instituto Nacional de Matemática Pura e Aplicada – IMPA, Rio de Janeiro, from September 25 to 26, 2015. Rio de Janeiro, September 26, 2015. Alexei Mailybaev Organizing Committee We hereby certify that, Marcio Arab Murad, Laboratório Nacional de Computação Científica, participated in the Workshop on Simulation of Complex Processes in Porous Media, held at Instituto Nacional de Matemática Pura e Aplicada – IMPA, Rio de Janeiro, from September 25 to 26, 2015. Rio de Janeiro, September 26, 2015. Alexei Mailybaev Organizing Committee We hereby certify that, Martinus van Genuchten, PEM - Programa de Engenharia Mecânica, participated in the Workshop on Simulation of Complex Processes in Porous Media, held at Instituto Nacional de Matemática Pura e Aplicada – IMPA, Rio de Janeiro, from September 25 to 26, 2015. Rio de Janeiro, September 26, 2015. Alexei Mailybaev Organizing Committee We hereby certify that, Paulo Herrera, Universidad de Chile - Matematica, participated in the Workshop on Simulation of Complex Processes in Porous Media, held at Instituto Nacional de Matemática Pura e Aplicada – IMPA, Rio de Janeiro, from September 25 to 26, 2015. Rio de Janeiro, September 26, 2015. Alexei Mailybaev Organizing Committee We hereby certify that, Renato Machado Cotta, PEM - Programa de Engenharia Mecânica, participated in the Workshop on Simulation of Complex Processes in Porous Media, held at Instituto Nacional de Matemática Pura e Aplicada – IMPA, Rio de Janeiro, from September 25 to 26, 2015. Rio de Janeiro, September 26, 2015. Alexei Mailybaev Organizing Committee