The Editors of The Prague Bulletin of Mathematical Linguistics wholeheartedly join the co-workers, former students and broader linguistic community to celebrate this year’s life anniversary of its founding Editor-in-Chief Professor PhDr. Petr Sgall, DrSc. Dr.h.c mult. (born May 27th, 1926). Petr Sgall is an outstanding member of the Czech linguistic community highly appreciated at home and abro...