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In computability theory, the Ackermann function, named after Wilhelm Ackermann, is one of the simplest and earliest-discovered examples of a total computable function that is not primitive recursive. All primitive recursive functions are total and computable, but the Ackermann function illustrates that not all total computable functions are primitive recursive.
Wilhelm Friedrich Ackermann was a German mathematician and logician best known for his work in mathematical logic and the Ackermann function, an important example in the theory of computation.
Ackermann is a surname. "Acker" comes from German or Old English, meaning "field", and is related to the word "acre". Ackermann means "farmer". Notable people with the surname, also spelled Akkermann. include:
The Ackermann steering geometry is a geometric arrangement of linkages in the steering of a car or other vehicle designed to solve the problem of wheels on the inside and outside of a turn needing to trace out circles of different radii.
Rudolph Ackermann was an Anglo-German bookseller, inventor, lithographer, publisher and businessman.
Rosemarie "Rosi" Ackermann is a German former high jumper, Olympic champion and multiple world record holder. In Berlin on 26 August 1977, she became the first female high jumper to clear a height of two metres.
Winterfresh is a wintergreen flavored variety of chewing gum made by the Wm. Wrigley Jr. Company. Introduced in the United States in 1994 as an alternative to their Big Red brand, it has had two packaging designs as of 2004. Extra gum, a sugarless gum, introduced a Winterfresh flavor in 1988, while Freedent introduced a Winterfresh flavor around the same time the Winterfresh brand gum was introduced.
Bruno Kramm is a German musician, known for programming, playing synthesizers and keyboards, co-fronting and performing backup vocals for the electro-industrial duo Das Ich, alongside Stefan Ackermann. Kramm is a multi-instrumentalist, singer-songwriter and founder of the German goth club, "Generation Gothic". He is also a record producer for a number of musical projects.
Anton Ackermann was an East German politician. In 1953, he briefly served as Minister of Foreign Affairs.
Josef Meinrad Ackermann is a Swiss banker, former chairman of the Bank of Cyprus, and former chief executive officer of Deutsche Bank. He has also been a member of the Washington-based financial advisory body, the Group of Thirty.
LourensWepener Hugo "Laurie" Ackermann was a South African judge who served on the Constitutional Court of South Africa from 1994 to 2004. Appointed to the inaugural court by Nelson Mandela, he is best known for his jurisprudence on dignity. He was formerly an academic, a practising advocate, and a judge of the Supreme Court of South Africa.
Ronny Ackermann is a German former Nordic combined skier.
Johannes Nicolaas 'Johan' Ackermann is a South African professional rugby union coach and former player. He played as a lock during his playing career between 1995 and 2007. He is currently the head coach at Urayasu D-Rocks.
Sam Bennett is an Irish professional cyclist who rides for UCI WorldTeam Decathlon–AG2R La Mondiale. He is a road sprinter who turned professional in 2011. He has won ten Grand Tour stages: three stages in the 2018 Giro d'Italia, two stages at the 2019 Vuelta a España, two stages at the 2020 Tour de France, where he also won the Points classification, one stage at the 2020 Vuelta a España, and two stages at the 2022 Vuelta a España.
Colin Niel Ackermann is a Dutch-South African cricketer who plays for Durham County Cricket Club in England and the Netherlands national cricket team. He made his international debut for the Netherlands in October 2019.
Ruan Ackermann is a South African professional rugby union player, currently playing in the English Premiership with Gloucester. His regular position is flanker.
Pascal Ackermann is a German cyclist, who currently rides for UCI ProTeam Israel Premier Tech Academy.
Else Ackermann was a German physician and pharmacologist who became an East German politician. The report on the power relationships between the citizen and the state which she drafted, and in 1988 presented, known as the "Neuenhagen Letter", was a significant precursor to the changes of 1989 which led to the ending, in the early summer of 1990, of the one-party system, followed by German reunification later that same year.
Ackermannviridae is a family of viruses in the class Caudoviricetes. Gammaproteobacteria in the phylum Pseudomonadota serve as natural hosts. There are two subfamilies, ten genera, and 63 species in the family.
Annemarie Ackermann was a German politician of the Christian Democratic Union (CDU) and former member of the German Bundestag.
References
- ↑ "Sean Ackermann". ESPN Cricinfo. Retrieved 1 December 2020.
