1 − 2 + 4 − 8 + ⋯ a convergent geometric series whose sum is by the usual formula. The Borel sum of is also ; when Émile Borel introduced the limit formulation of Borel summation in 1896, this was one of his first examples after 1 − 1 + 1 − 1 + ⋯ 1 − 2 + 4 − 8 + ⋯ In mathematics, is the infinite series whose terms are the successive powers of two with alternating signs. As a geometric series, it is characterized by its first term, 1, and its common ratio, −2. As a series of real numbers it diverges, so in
Quavers their Cheese flavour and 86 in the salt and vinegar variety. There was also a Cheese and Onion flavour in the 1980s which, although proved very popular, was discontinued. The first mascot of Quavers was a hyperactive cartoon dog named 'Colin Curly', created by Bob Lawrie and voiced by Lenny Henry who featured in many TV commercials. Colin also appeared in two Amiga and Atari ST puzzle games: "Pushover" (1992) and its sequel, "One Step Beyond" (1993), both published by Ocean. The second was a boy named Quentin Quaverhead and his family. They were first seen in a memorable advertisement