Schubert (1949) showed that every knot can be uniquely decomposed (up to the order in which the decomposition is performed) as a knot sum of a class of knots known as prime knots, which cannot themselves be further decomposed (Livingston 1993, p. 5; Adams 1994, pp.
The Moors were Muslim inhabitants of the Maghreb, the Iberian Peninsula, Sicily, and Malta during the Middle Ages.
Persistence drove the Moors from Spain. Spain was not a unified country when the Moors invaded in 711 AD. Over the next 700+ years the various kingdoms of Spain drove the Mo â¦ ors from the north to the south a piece at a time. Eventually all that was left to the Moors was Granada.