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 name Moors comes from the name Mauretania, which at the time referred to the part of north Africa roughly now represented by Algeria and Morocco. The Alhambra, Granada, a fine Moorish Palace.