Formal and Analytic Solutions of Diff. Equations

These proceedings provide methods, techniques, different mathematical tools and recent results in the study of formal and analytic solutions to Diff. (differential, partial differential, difference, q-difference, q-difference-differential.... ) Equations.  They consist of selected contributions from the conference "Formal and Analytic Solutions of Diff.  Equations", held at Alcalá de Henares, Spain during September 4-8, 2017. Their topics include summability and asymptotic study of bot