Diese Sammlung mathematischer Aufs tze enth lt wichtige Beitr ge f hrender Mathematiker des sp ten 19. und fr hen 20. Jahrhunderts. Ein Muss f r jeden Mathematikliebhaber This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may...