"Petri, Carl Adam"@en . . "1926Z"^^ . . "German mathematician" . "1926-07-12Z"^^ . . "2010-07-02Z"^^ . . . "Carl Adam Petri (12 July 1926 \u2013 2 July 2010) was a German mathematician and computer scientist. He was born in Leipzig.Petri nets were invented in August 1939 by Carl Adam Petri \u2013 at the age of 13 \u2013 for the purpose of describing chemicalprocesses."@en . "Carl Adam Petri"@en . . . . "2010Z"^^ . .