The Workshop FASFE19, to be held in Valladolid (Spain) from September 9th to 12th, will bring together experts and younger researchers in the field of Formal and Analytic Solutions of Functional Equations, with the aim of improving the exchange of ideas and creating new scientific collaborations.

The Organizing and Scientific Committees have the commitment to make this meeting profitable and fruitful, please do not hesitate to contact them for any question or advice at This email address is being protected from spambots. You need JavaScript enabled to view it..

Página web del congreso:FASFE19.


Among other topics, we highlight the following ones:

  • Formal and analytic solutions for ordinary differential equations in the complex domain. Stokes multipliers.
  • Formal and analytic solutions of other kinds of functional equations: difference, q-difference, differential-difference, moment-differential and PD equations.
  • Summability of WKB solutions, singular perturbations problems.
  • Asymptotic expansions, Borel summability.
  • Algebraic study of solutions of differential equations and D-modules.


Please find here the final schedule for the Workshop.


Scientific Committee

Alberto Lastra (University of Alcalá, Spain)

Stéphane Malek (University of Lille, France)

Jorge Mozo (University of Valladolid, Spain)

Yasunori Okada (Chiba University, Japan)

Javier Sanz (University of Valladolid, Spain)

Hidetoshi Tahara (Sophia University, Japan)


Organizing Committee


Alberto González Sanz (University of Valladolid, Spain)

Javier Jiménez-Garrido (University of Valladolid, Spain)

Alberto Lastra (University of Alcalá, Spain)

Ignacio Miguel Cantero (University of Valladolid, Spain)

Jorge Mozo (University of Valladolid, Spain)

Javier Sanz (University of Valladolid, Spain)