Go-go dancing 1960s-era clubgoers wore miniskirts and knee-high, high-heeled boots, which eventually came to be called go-go boots. Night club promoters in the mid‑1960s then conceived the idea of hiring women dressed in these outfits to entertain patrons. The term "go-go" derives from the phrase "go-go-go" for a high-energy person, and was influenced by the French expression "à gogo", meaning "in abundance, galore", which is in turn derived from the ancient French word "la gogue" for "joy, happiness". On 19 June 1964, Carol Doda began go-go dancing topless at the Condor Club on Broadway and Columbus in the North Beach neighborhood of
Sturmian word by "μ"("w"). For a Sturmian word "s", every finite factor has a frequency. The three-gap theorem implies that the factors of fixed length "n" have at most three distinct frequencies, and if there are three values then one is the sum of the other two. For words over an alphabet of size "k" greater than 2, we define a Sturmian word to be one with complexity function "n" + "k" − 1. They can be described in terms of cutting sequences for "k"-dimensional space. An alternative definition is as words of minimal complexity subject to not being ultimately periodic. A