Stanley Electric Stanley Electric Stanley Electric Co., Ltd. (, "Sutanrē Denki Kabushiki-gaisha") is a Japanese company, producing electric light sources. Stanley has 36 consolidated subsidiaries, three associated companies, 23 factories in eight countries, offices in 17 countries and over 16,000 employees. The main customers for its core business (automotive lighting) are Honda and Nissan. Other customers using Stanley's products include Toyota, Mazda, Suzuki, Mitsubishi, Ford and Chrysler. Stanley is listed in the TOPIX of the Tokyo Stock Exchange. The company was founded in 1920 by Takaharu Kitano, who named the company after the British-American explorer Henry Morton Stanley famous for exploring Africa.
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