This conference is in honor of Serge Nicaise 60th birthday. Serge is an internationally renowed researcher in the field of partial differential equations with more than 300 peer-reviewed papers totalling more than 3000 citations. He also has directed 27 Ph. D. theses. Serge has also been a driving force behind the development of mathematics in Université Polytechnique Hauts de France (formerly Université de Valenciennes et du Hainaut-Cambrésis) and actively contibutes to the Fédération de Recherche Mathématique des Hauts de France.