answers: Olympic rings
context: New York Times. The superellipse was used for the shape of the 1968 Azteca Olympic Stadium, in Mexico City. Waldo R. Tobler developed a map projection, the Tobler hyperelliptical projection, published in 1973, in which the meridians are arcs of superellipses. The logo for news company The Local consists of a tilted superellipse matching the proportions of Sergels Torg. Three connected superellipses are used in the logo of the Pittsburgh Steelers. In computing, mobile operating system iOS uses a superellipse curve for app icons, replacing the rounded corners style used up to version 6. Superellipse A superellipse, also known as </s> rings are five interlocking rings, coloured blue, yellow, black, green, and red on a white field, known as the "Olympic rings". The symbol was originally designed in 1912 by de Coubertin. He appears to have intended the rings to represent the five continents: Europe, Asia, Africa, Oceania, and America. According to Coubertin, the colours of the rings together with the white of the background included the colours composing every competing nation's flag at the time. Upon its initial introduction, Coubertin stated the following in the August 1912 edition of "Olympique": In his article published in the "Olympic Revue" the official </s> of the Homeric Greek κρίκος ("krikos"), meaning "hoop" or "ring". The origins of the words "circus" and "circuit" are closely related. The circle has been known since before the beginning of recorded history. Natural circles would have been observed, such as the Moon, Sun, and a short plant stalk blowing in the wind on sand, which forms a circle shape in the sand. The circle is the basis for the wheel, which, with related inventions such as gears, makes much of modern machinery possible. In mathematics, the study of the circle has helped inspire the development of geometry, astronomy and
question: what are the 5 circles in the olympics