
The history of Mathematics [L'histoire des Mathématiques].
Non Euclidian Geometries [Les géométries non euclidiennes], XIXth century.
The Infinites [Les infinis], end of the XIXth century.
The Incompleteness [L'incomplétude], beginning of the XXth century.
The Fractal Geometry [La géométrie fractale], midle of the XXth century.