In 1920 Cec h submitted his thesis under the title On curve and surface elements
of the third order in projective space". Then he studied in a systematic
manner the projective dierential geometry of surfaces and today he is taken for
one of the founders of this eld. At that time Cec h familiarized himself with
several new ideas by an excellent Italian mathematician G. Fubini and spent the
academic year 1921-22 in Turin. Fubini realized early the extraordinary capabilities
of young Cec h and posed him many problems. Finally he oered Cec h to
write a joint book Geometria Proiettiva Dierenziale I, II", Bologna 1926, 1927.
In this book, special attention is paid to the problem of projective deformation.
To make their results more accessible to general public, both authors decided to
prepare a single book in French Introduction a la geometrie dierentielle projective
des surfaces", Paris 1931. 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
In 1920 Cec h submitted his thesis under the title On curve and surface elementsof the third order in projective space". Then he studied in a systematicmanner the projective di erential geometry of surfaces and today he is taken forone of the founders of this eld. At that time Cec h familiarized himself withseveral new ideas by an excellent Italian mathematician G. Fubini and spent theacademic year 1921-22 in Turin. Fubini realized early the extraordinary capabilitiesof young Cec h and posed him many problems. Finally he o ered Cec h towrite a joint book Geometria Proiettiva Di erenziale I, II", Bologna 1926, 1927.In this book, special attention is paid to the problem of projective deformation.To make their results more accessible to general public, both authors decided toprepare a single book in French Introduction a la geometrie di erentielle projectivedes surfaces", Paris 1931. 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
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