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
Wait a Minim! Wait a Minim! Wait a Minim! (1962-68) was a musical revue conceived by Leon Gluckman, with original songs by Jeremy Taylor, and a collection of international folk music arranged by Andrew Tracey. Many authentic instruments were played to accompany dances and pantomimes satirizing the national characteristics and political and social eccentricities of many different countries. The only spoken words were when the cast was introduced, and in the South African scene where apartheid was ridiculed. The revue originated in South Africa and toured Southern Rhodesia (now Zimbabwe), and London before opening on Broadway in New York City. The show opened