Adagio in B minor (Mozart) Flute Quartet No. 1 in D major, K. 285. The Austrian composer and academic Gerhard Präsent has made an arrangement for string quartet in four movements "Fantasy Quartet in D" in which this piece acts as the third one. The autograph is at the Library, Stockholm. Adagio in B minor (Mozart) The Adagio in B minor for piano, K. 540, by Wolfgang Amadeus Mozart is a standalone composition for solo piano, and was entered into his "Verzeichnis aller meiner Werke" ("Catalogue of all my Works") on March 19, 1788. At 57 measures, the length of the piece is largely based
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