"1984Z"^^ . "1984-11-09Z"^^ . "German mathematician" . "Petersson, Hans"@en . "1902-06-26Z"^^ . "Hans Petersson (24 September 1902, Bentschen \u2013 9 November 1984, M\u00FCnster) was a German mathematician. He introduced the Petersson inner product and is also known for the Ramanujan\u2013Petersson conjecture."@en . "1902Z"^^ .