In mathematics, a square number or perfect square is an integer that is the square of an integer; in other words, it is the product of some integer with itself. For example, 9 is a square number, since it can be written as 3âÃâ3.
Yes are an English rock band formed in London in 1968 by singer Jon Anderson and bassist Chris Squire. The band have undergone numerous formations throughout its history; nineteen musicians have been full-time members. Since June 2015, it has consisted of guitarist Steve Howe, drummer Alan White, keyboardist Geoff Downes, singer Jon Davison, and bassist Billy Sherwood. Yes adopted several changes in musical style, from rearranged covers to progressive and art rock in the 1970s, before moving towards pop in the 1980s.
The Ex (band) The Ex are an underground band from the Netherlands that formed in 1979 at the height of the original punk explosion. Initially known as an anarcho-punk band, they have since released over 20 full-length albums of musical experiments and numerous collaborations blending punk and free jazz with styles of folk music from all over the world.