Stanley Hotel, Nairobi Stanley Hotel, Nairobi The Stanley Hotel (currently called the Sarova Stanley) is a five-star hotel in Nairobi, Kenya. It is the oldest hotel in the city, having been established in 1902 by English businesswoman Mayence Bent, when the city was a railway halt. It is named after Sir Henry Morton Stanley, a Welsh explorer who is best known for his explorations of central Africa and his successful search for missionary and explorer David Livingstone. Since the early 1900s, the Stanley Hotel has been known as the traditional meeting place for those going on safari in Kenya. It has played host
19th century in science later in the 19th century by the German mathematician Bernhard Riemann; here no parallel can be found and the angles in a triangle add up to more than 180°. Riemann also developed Riemannian geometry, which unifies and vastly generalizes the three types of geometry. The 19th century saw the beginning of a great deal of abstract algebra. Hermann Grassmann in Germany gave a first version of vector spaces, William Rowan Hamilton in Ireland developed noncommutative algebra. The British mathematician George Boole devised an algebra that soon evolved into what is now called Boolean algebra, in which the only numbers were