. . . "2005-09-22Z"^^ . . . . . . "Hans Samelson"@en . . "1916-03-03Z"^^ . "Samelson, Hans"@en . "1916Z"^^ . . "Hans Samelson (3 March 1916 \u2013 22 September 2005) was a German American mathematician who worked in differential geometry, topology and the theory of Lie groups and Lie algebras\u2014important in describing the symmetry of analytical structures."@en . "2005Z"^^ . "German mathematician" . .