"1792Z"^^ . . "1792-05-06Z"^^ . "Ohm, Martin"@en . . "German mathematician" . "Martin Ohm (May 6, 1792, Erlangen \u2013 April 1, 1872, Berlin) was a German mathematician and a younger brother of physicist Georg Ohm."@en . . "1872-04-01Z"^^ . "1872Z"^^ . .