[2][3] She was the first Italian to join the Deutsche Mathematiker-Vereinigung (DMV), in 1905, and in 1908 became the first woman invited to deliver a lecture at International Congress of Mathematicians (ICM).
[4][5] Pisati was born in Ancona, and worked as a teacher at a secondary school for girls in Rome beginning in 1897.
[5] Her work for the Congress was titled "Saggio di una teoria sintetica delle funzioni di variabile complessa" ["An Essay on a Synthetic Theory of Functions of a Complex Variable"], and was presented by Roberto Marcolongo.
[5][7][8] Her geometry textbook Elementi di geometria ad uso delle scuole medie inferiori, published in 1907, was part of a movement in Italian teaching of the time reacting against a presentation of the material focusing on intuition and hands-on experimentation, as had become popular beginning in the 1880s, and returning to a style of teaching geometry that included more rigorous proofs.
In her preface, Pisati wrote that it would be a mistake to omit formal proofs and that it is not any more difficult to include this material.