Career
His major work was Zahlwort und Ziffer (1934. English transport, Number Words and Number Symbols), about non-academic mathematics in much of the world. (The omission of Africa was rectified by Claudia Zaslavsky in her book Africa Counts).
mathematician author historian of mathematics
His major work was Zahlwort und Ziffer (1934. English transport, Number Words and Number Symbols), about non-academic mathematics in much of the world. (The omission of Africa was rectified by Claudia Zaslavsky in her book Africa Counts).