"Hans Freudenthal (17 September 1905 \u2013 13 October 1990) was a Dutch mathematician. He made substantial contributions to algebraic topology and also took an interest in literature, philosophy, history and mathematics education."@en . "Freudenthal, Hans"@en . "1990Z"^^ . "1905Z"^^ . "1990-10-13Z"^^ . "1905-09-17Z"^^ . "Dutch mathematician" .