2026, March 16-20, The classification of finite simple groups, workshop and general overview, Tsinghua University, Beijing, China.

2023, December 11-15, Minicorso Lean, last week of the Laboratorio di formalizzazione di dimostrazioni matematiche tramite il software Lean, Università di Pisa, Italy.

2023, May 2-6, Atelier Lean, during the seventh mini symposium of the Roman Number Theory Association, with Riccardo Brasca, Filippo Nuccio, Università Roma Tre, Italy.

2021, August 16-20, Superficies Racionales sobre un Cuerpo, AGRA IV, two-week school in Arithmetic, Groups and Analysis (online).

2019, July 22-26, Arithmetic properties of del Pezzo surfaces, Düsseldorf, Germany.

2014, February 17-21, Rational points on varieties, LEGAL 2014, Liberdade Em Geometria Algébrica, Teresópolis, Brazil.

2014, January 30-February 6, Cox Rings of Rational Surfaces, IMPA, Rio de Janeiro, Brazil.

2014, January 14-21, Cox Rings of Rational Surfaces, Universidad de Concepción, Chile.

2013, January 5-15, Rational points on surfaces, Universidad de Concepción, Chile.

2008, April 14-18, Instructional workshop on Surfaces: Geometry and Arithmetic, with Martin Bright, Ronald van Luijk, Warwick, UK (programme).