Abraham Plessner, Date of Birth, Place of Birth, Date of Death
TweetAbraham Plessner
Russian mathematician
Date of Birth: 13-Feb-1900
Place of Birth: Łódź, Łódź Voivodeship, Poland
Date of Death: 18-Apr-1961
Profession: mathematician
Zodiac Sign: Aquarius 
About Abraham Plessner
- Abraham Plessner (February 13, 1900 – April 18, 1961) was a Russian mathematician.
- He was born on February 13, 1900, to a Jewish family in Lódz, which is now in Poland.
- He studied at secondary school where he was taught in Russian, German, and Polish.
- He studied at the University of Giessen where he studied under Ludwig Schlesinger and Friedrich Engel.
- He also studied at the University of Göttingen and Berlin.
- He completed his doctorate from the University of Giessen in 1922.
- Jointly with Kurt Hensel he edited Kronecker's collected works. After completing his doctorate, Plessner worked in Marburg where he published a paper containing what is now called Plessner's theorem.
- It is a theorem concerning the boundary behaviour of functions meromorphic in the unit disk. Plessner submitted his habilitation, the extra post-doctoral qualification needed to lecture at a German university, to the faculty at the University of Giessen.
- He was denied because he happened to be a Russian citizen.
- He then moved to Moscow and joined the research group of Nikolai Nikolaevich Luzin at Moscow State University.
- Though he left Germany before the Nazi's seized power in 1933, some scholars consider him an early Jewish emigrant from Nazi Germany; his career was negatively impacted by anti-semitism and he was not able to return to Germany, unlike early non-Jewish emigrants such as Eberhard Hopf and Wilhelm Maier.
- One scholar writes that in Plessner's case "the anti-Semitic prejudice was mixed with and partly hidden by concern for their lack of a German citizenship".In 1939, he became a professor at Moscow State University.
- He also held a position at the Mathematical Institute of the USSR Academy of Sciences.
- In 1949, he was dismissed from both posts during the Soviet campaign against "rootless cosmopolitans". Plessner is widely viewed as a founder of the Moscow school of functional analysis.
- He faced financial and health problems in his later years.
- He died on April 18, 1961, in Moscow.
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