Almost immediately, John Milnor observed that a theorem due to Ernst Witt implied the existence of a pair of 16-dimensional tori that have the same eigenvalues but different shapes.
He constructed a pair of flat tori of 16 dimension, using arithmetic lattices first studied by Ernst Witt.
Ernst & Young | Max Ernst | Ernst Haeckel | Marcos Witt | Ernst Mayr | Ernst Jünger | Ernst Zündel | Ernst Gombrich | Ernst Mach | Johan de Witt | Ernst Ulrich von Weizsäcker | Ernst Moritz Arndt | Ernst Lubitsch | Ernst Bloch | Katarina Witt | Karl Ernst von Baer | Heinrich Wilhelm Ernst | Ernst & Young Entrepreneur of the Year Award | Ernst van de Wetering | Ernst Toller | Ernst Thälmann Pioneer Organisation | Ernst Röhm | Ernst of Schaumburg | Ernst Ludwig Kirchner | Ernst Ludwig Gerber | Ernst Heinrich Weber | Ernst Hanfstaengl | Ernst Haefliger | Ernst Detlof von Krassow | Ernst Cassirer |