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.
The description Moors has referred to several historic and modern populations of Muslim (and earlier non-Muslim) people of Berber and Arab descent from North Africa, some of whom came to inhabit the Iberian Peninsula are the indigenous peoples of North Africa west of the Nile Valley.he description Moors has referred to several historic and modern populations of Muslim (and earlier non-Muslim) people of Berber and Arab descent from North Africa, some of whom came to inhabit the Iberian Peninsula are the indigenous peoples of North Africa west of the Nile Valley.