Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.
Edouard Goursat (1858-1936) was a French mathematician known for his significant contributions to the field of mathematics, particularly in complex analysis and differential equations. Goursat's work on analytic functions and power series has had a lasting impact on mathematical analysis. His expertise in mathematical theory and teaching made him a respected figure in the mathematical community.