Robert Zero Karl Oskar Broberg (2 July 1940 – 21 July 2015) was a Swedish singer, composer and artist. As an artist, he used various names: Robban or Robban Broberg (1957–1968), Robert Karl-Oskar Broberg (1968–1974), Zero (1974–1982) and starting 1982 the present name Robert Broberg.
When Broberg studied at Konstfack in 1957, he claimed that he had a skiffle group and later he was invited to play with his skiffle group at the dance restaurant Lorry in Sundbyberg. Then he quickly collected friends and they started rehearsing. Later he started writing own songs.
In 1989 he received "Karamelodiktstipendiet". He died from Parkinson's disease on 21 July 2015 at the age of 75.
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Plats is a commune in the Ardèche department in southern France.
Plats was called Planum in 1275, Plana in XIVe, Plais in XVIIIe, then he was called Plas and Plats. The name of the town is written プラ in Japanese, Пла in Russian and 쁠라 in Korean.
In the mathematical field of knot theory, a 2-bridge knot is a knot which can be isotoped so that the natural height function given by the z-coordinate has only two maxima and two minima as critical points. Equivalently, these are the knots with bridge number 2, the smallest possible bridge number for a nontrivial knot.
Other names for 2-bridge knots are rational knots, 4-plats, and Viergeflechte (German for four braids). 2-bridge links are defined similarly as above, but each component will have one min and max. 2-bridge knots were classified by Horst Schubert, using the fact that the 2-sheeted branched cover of the 3-sphere over the knot is a lens space.
The names rational knot and rational link were coined by John Conway who defined them as arising from numerator closures of rational tangles.