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- Q2069856 description "Dutch mathematician".
- Q2069856 description "Dutch mathematician".
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- Q2069856 abstract "Willem Klein (4 December 1912 – 1 August 1986), also known as Wim Klein or under his stage names Pascal and Willy Wortel, was a Dutch mathematician, famous for being able to carry out very complicated calculations in his head very fast. On 27 August 1976, he calculated the 73rd root of a 500-digit number in 2 minutes and 43 seconds. This feat was recorded by the Guinness Book of Records.Wim Klein was born in Amsterdam, Netherlands on 4 December 1912 to Henry Klein, GP, and Emma Cohen. Klein had a rough childhood because his father wanted him to become a Doctor (as his father was), even though he was quite opposed to the idea. In addition to this pressure, his mother also committed suicide in 1929. In 1932, when Klein finished High School, despite wanting badly to pursue his love of mathematics, he gave in to his father's demands and enrolled at the University of Amsterdam for Medicine; he succeeded in getting his Bachelor's degree in 1935.When his father died in 1937, he initially continued with the path his father wanted, passing the first part of his doctoral exam, however he eventually gave up. Although he did not officially drop out of the doctoral program, but he did not study any more and was therefore unable to advance. It was around this time that he discovered his homosexuality. Both Klein and his older brother Leo were regularly examined by a neurologist in Amsterdam, BB Stokvis, for their incredible computing capabilities. Stokvis labeled Wim as a "auditory calculator," and his brother Leo as a "visual calculator."When the Germans invaded in May 1940, Klein began working in a Jewish hospital and continued with his doctoral studies in 1941. In 1942, though, he had to hide, especially since his brother was captured and taken to the Sobibór extermination camp, where he would eventually die. After the war, Klein returned to his doctoral studies, but he also worked in circuses in France, Belgium, and the Netherlands, performing fast calculations as an act, often under the stage name 'Pascal'. He lived a fairly nomadic lifestyle and performed in such shows until 1952, when his skills went to a more serious use.In 1952, Klein was hired by the Mathematisch Centrum (English: Mathematical Center) in Amsterdam as a scientific calculator (Note that computers were only beginning to be developed, so calculations could be much more quickly and reliably done by a human like Klein). In 1954, the International Congress of Mathematicians was held in Amsterdam, so he attended. This inspired him to do shows again, so he went back to his nomadic lifestyle and performed internationally again for a few years until he was hired by CERN in 1958. This officially marked an end to his nomadic lifestyle. He was initially a great help to the physicists at CERN, but as computers became more powerful in the 1960s and physicists began programming more, Klein was more often used as a mascot for CERN who would do calculations for visitors. This disheartened him to the point where he would often say that Switzerland (the location of CERN) is a beautiful country, but it's a shame there are so many Swiss people living there ("Een mooi land. Alleen jammer dat er zoveel Zwitsers wonen," in Dutch). CERN often still recognizes him as their first computer though.In 1975, the commemoration of the seven hundredth anniversary of the settlement of Amsterdam made him feel homesick, so in 1976, Klein retired early from CERN. He continued to do calculations for show, this time with the stage name 'Willy Wortel,' although this time he started to become more interested in breaking records, trying hard to improve his time and beat new records. This continued until 1 August 1986, when Klein's housekeeper found him dead in his home in Amsterdam, brutally murdered with a knife. Although a young man was arrested, there was no evidence of his involvement in the case and he was soon released. The murder remains unsolved to this day.".
- Q2069856 alias "Wim Klein, Pascal, Willy Wortel".
- Q2069856 birthDate "1912-12-04".
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- Q2069856 birthYear "1912".
- Q2069856 deathDate "1986-08-01".
- Q2069856 deathPlace Q55.
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- Q2069856 deathYear "1986".
- Q2069856 wikiPageExternalLink birth-web.
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- Q2069856 alternativeNames "Wim Klein, Pascal, Willy Wortel".
- Q2069856 dateOfBirth "1912-12-04".
- Q2069856 dateOfDeath "1986-08-01".
- Q2069856 name "Klein, Willem".
- Q2069856 placeOfBirth "Amsterdam, Netherlands".
- Q2069856 placeOfDeath "Amsterdam, Netherlands".
- Q2069856 shortDescription "Dutch mathematician".
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- Q2069856 comment "Willem Klein (4 December 1912 – 1 August 1986), also known as Wim Klein or under his stage names Pascal and Willy Wortel, was a Dutch mathematician, famous for being able to carry out very complicated calculations in his head very fast. On 27 August 1976, he calculated the 73rd root of a 500-digit number in 2 minutes and 43 seconds. This feat was recorded by the Guinness Book of Records.Wim Klein was born in Amsterdam, Netherlands on 4 December 1912 to Henry Klein, GP, and Emma Cohen.".
- Q2069856 label "Willem Klein".
- Q2069856 givenName "Willem".
- Q2069856 name "Klein, Willem".
- Q2069856 name "Willem Klein".
- Q2069856 surname "Klein".