. . . . "Alexander Oppenheim"@en . "1997-12-13Z"^^ . . . . "1903-02-04Z"^^ . "1997Z"^^ . . . . "British mathematician" . . "1903Z"^^ . "Sir Alexander Oppenheim, OBE FRSE PMN (4 February 1903 \u2013 13 December 1997) was a British mathematician. In mathematics, his most notable contribution is his Oppenheim conjecture."@en . . "Oppenheim, Alexander"@en .