Konrad Knopp

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Konrad Knopp

Konrad Theodor Hermann Knopp (born July 22, 1882 in Berlin , † April 20, 1957 in Annecy ) was a German mathematician who mainly dealt with function theory and analysis (especially series developments ).

Life

Knopp's father Paul Knopp (1845–1904) was an entrepreneur in Neustettin . Knopp attended school in Berlin and then studied in Lausanne (1901) and Berlin, where he heard from Ferdinand Georg Frobenius , Friedrich Schottky , Edmund Landau , Hermann Amandus Schwarz and Issai Schur , passed his teacher’s exam in 1906 and received his doctorate from Schottky in 1907 (“Grenzwerte of series approaching the convergence limit ”; in this he proved that Hölder's limitation method implies that of Cesàro ). In 1908/9 he went - after he had started a traineeship - to Japan, where he taught at the commercial college in Nagasaki and visited India and China on the way back to Germany. After his marriage in 1910 he went to China to the German colony ("protected area") Tsingtau , where he taught at the German-Chinese university . After returning in 1911, he taught at the Military Technical Academy and the War Academy in Berlin and wrote his habilitation at the same time . During the First World War he served as a reserve officer, but was released after being wounded in autumn 1914 (Iron Cross) and taught at the University of Berlin. In 1915 he became associate professor and in 1919 full professor at the Albertus University in Königsberg . From 1926 until his retirement in 1950 he was a professor in Tübingen . He died of a stroke in Annecy, France.

Knopp was best known for his textbooks "Theory and Application of the Infinite Series" (Basic Teachings of Mathematical Sciences, Springer, 1922), the processing of Hans von Mangoldt's "Higher Mathematics" (known for short as Mangoldt / Knopp) and especially his " Elements of the theory of functions ”in Göschen (first in 1926, 2 volumes and 2 exercise volumes). His books on function theory are also widely used in English translation (at Dover) and are widely used. They are considered to be one of the best introductions to the field. In 1918, Knopp and others founded the " Mathematical Journal ". He was a corresponding member of the Bavarian Academy of Sciences. He was Dr. rer. nat. hc

In 1910 he married the painter Gertrud Kressner (1879–1974). The daughter Ortrud Knopp (1911-1976) with the grandchildren Willfried Spohn ( 1944-2012 ), Herbert Spohn (* 1946) and Wolfgang Spohn (* 1950) and the son Ingolf Knopp (1915-2008) with the grandchildren went out of the marriage Brigitte Knopp (* 1952) and Werner Knopp (* 1954).

Works

  • Theory and Application of Infinite Series , 6th edition 1996, Springer, ISBN 3-540-59111-7 , edition from 1964 online here [1]
  • Function theory , Vol. 1 Basis of the general theory of analytical functions, 13th edition 1976, Vol. 2 Application and continuation of the general theory, 13th edition 1981, de Gruyter (Göschen Collection)
  • Collection of exercises on the theory of functions , vol. 1, 8th edition 1977, vol. 2, 6th edition 1964, de Gruyter (Göschen collection)
  • Mathematics as a cultural activity , Mathematical Intelligencer Vol. 7, 1985, No. 1
  • with von Mangoldt: Höhere Mathematik - an introduction for students to self-study , 3 vols., 17th edition (in vol. 1) 1990, Hirzel Verlag, (vol. 1 numbers, functions, limit values, analytical geometry, algebra, set theory, vol . 2 differential calculus, infinite series, elements of differential geometry and function theory, vol. 3 integral calculus and its application, function theory, differential equations, volume 4 by Friedrich Lösch: set theory, Lebesgue measure and integral, topological spaces, vector spaces, functional analysis, integral equations)

Individual evidence

  1. ^ According to the circular letter from the Albertus University of Christmas 1957, Knopp died on April 30, 1957 in Tübingen
  2. ^ Letter from the Albertus University , Christmas 1957

literature

Web links

personal data
SURNAME Knopp, Konrad
ALTERNATIVE NAMES Knopp, Konrad Theodor Hermann (full name)
BRIEF DESCRIPTION German mathematician
DATE OF BIRTH July 22, 1882
PLACE OF BIRTH Berlin
DATE OF DEATH April 20, 1957
Place of death Annecy