Welcome! The 15th MEMO will be held in Croatiafrom 23rd to 29th of August 2021. The main organizer of the competition isthe Croatian Mathematical Society. The main sponsor isthe Ministry of Science and Education. The organization is helped by the Faculty of Electrical Engineering and Computing of University of Zagreb. The organization is helped bythe Zagreb Tourist Board. The organization is supported bythe Croatian National Tourist Board. The organization is helped by the Young Gifted Mathematicians “Marin Getaldić”.