to Beijing CSRC, Beijing + Department of Mechanics and Engineering Science, Beijing, July 2018 (one week);
to the Department of Mathematics, Sichuan University, Chengdu, Augutst 2018 (3.5 weeks);
to the Department of Mathematics, Sichuan University, Chengdu, January 2019 (2 weeks).
Julie Valein staid for 10 days in Valparaiso (Chile ) and gave a talk to the workshop ICoPS 2018; she staid in Santiago (2-14 December 2018) to collaborate with E. Cerpa.