. . . . . . "988265678"^^ . . . . . "Rudolf Kochend\u00F6rffer"@en . . . . . . "Paul Joachim Rudolf Kochend\u00F6rffer (Berlim, 21 de novembro de 1911 \u2013 Dortmund, 23 de agosto de 1980) foi um matem\u00E1tico alem\u00E3o, que trabalhou com \u00E1lgebra."@pt . . . . . . . . . . . . . . . "1980-08-23"^^ . "1911-11-21"^^ . . . . "55606200"^^ . . "Rudolf Paul Joachim Kochend\u00F6rffer (21 November 1911 in Pankow \u2013 23 August 1980 in Dortmund) was a German mathematician who was a Professor of mathematics in the University of Rostock specialising in algebra, Group theory and theory of finite groups and their representation. During World War II, Kochend\u00F6rffer worked as a mathematical cryptanalyst in the mathematical referat of Inspectorate 7/IV, that would later become part of Referat I of Group IV of the General der Nachrichtenaufkl\u00E4rung (abbr. GDNA), the signals intelligence agency of the Wehrmacht and was known as a cryptographic tester of the Enigma cipher machine. Kochend\u00F6rffer was a Member of the Scientific Advisory Council for Mathematics at the State Secretariat for the Higher and Specialist Schools of the GDR, a staff member of Mat"@en . . . . . . "Paul Joachim Rudolf Kochend\u00F6rffer (* 21. November 1911 in Berlin-Pankow; \u2020 23. August 1980 in Dortmund) war ein deutscher Mathematiker, der sich mit Algebra besch\u00E4ftigte."@de . . . "Rudolf Kochend\u00F6rffer (Mathematiker)"@de . . . . . ""@en . . . . . . . . . . . . "Mathematician Kochendoerffer.jpg"@en . . . "Rudolf Kochend\u00F6rffer"@en . "Writing several textbooks on algebra and group theory. Tester of Enigma cipher machine security, and decoding of Swiss Enigma K."@en . . "1911-11-21"^^ . . . . . . . . "7007"^^ . . . . . . . . . . . . . . . "Rudolf Kochend\u00F6rffer"@en . . "1980-08-23"^^ . . . "University of Rostock"@en . . . . . . . . . . . "Paul Joachim Rudolf Kochend\u00F6rffer (* 21. November 1911 in Berlin-Pankow; \u2020 23. August 1980 in Dortmund) war ein deutscher Mathematiker, der sich mit Algebra besch\u00E4ftigte."@de . . . . "Paul Joachim Rudolf Kochend\u00F6rffer (Berlim, 21 de novembro de 1911 \u2013 Dortmund, 23 de agosto de 1980) foi um matem\u00E1tico alem\u00E3o, que trabalhou com \u00E1lgebra."@pt . . . . . . . . . . . . "Erhard Schmidt"@en . . . . . . . "Rudolf Paul Joachim Kochend\u00F6rffer (21 November 1911 in Pankow \u2013 23 August 1980 in Dortmund) was a German mathematician who was a Professor of mathematics in the University of Rostock specialising in algebra, Group theory and theory of finite groups and their representation. During World War II, Kochend\u00F6rffer worked as a mathematical cryptanalyst in the mathematical referat of Inspectorate 7/IV, that would later become part of Referat I of Group IV of the General der Nachrichtenaufkl\u00E4rung (abbr. GDNA), the signals intelligence agency of the Wehrmacht and was known as a cryptographic tester of the Enigma cipher machine. Kochend\u00F6rffer was a Member of the Scientific Advisory Council for Mathematics at the State Secretariat for the Higher and Specialist Schools of the GDR, a staff member of Mathematical Reviews and collaborated with the Zentralblatt MATH"@en . "Rudolf Kochend\u00F6rffer"@pt . . .