In 1945 Cec h moved to Praque, where he developed a great eort to organize
Czechoslovak mathematical activities. Roughly speaking, in the period 1947-54 he
was the director of the Mathematical Institute of the Czechoslovak Academy of Sciences.
Since 1954 he organized the Charles University Mathematical Institute. He
participated on several textbooks for secondary schools. Until his death on March
15, 1960, Cec h worked in the projective dierential geometry of correspondences
and line congruences. Nevertheless, he was also interested in general topology
and wrote a book Topological spaces" (in Czech). Altogether, he published 94
research papers and 10 books.