Mathematische Werke - Herausgegeben unter Mitwirkung einer von der koniglich preussischen Akademie der Wissenschaften eingesetzten Commission

The German mathematician Karl Weierstrass (1815–97) is generally considered to be the father of modern analysis. This seven-volume edition of his collected mathematical works in German, published between 1894 and 1927, demonstrates his rigorous approach, which still dominates the first analysis course at any university.