This is one of the most famous books on projective dierential geometry. The rst coworker of Cec h in Brno was Otakar Boruvka, who developed the theory of correspondences between projective planes at the end of twenties.
This is one of the most famous books on projectivedi erential geometry. The rst coworker of Cec h in Brno was Otakar Boruvka,who developed the theory of correspondences between projective planes at the endof twenties.