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 Moors of Europe. Etymology. Variants of the term Moor have been used by many Europeans since ancient times as a general description for indigenous Africans. Contrary to popular belief, the term is not synonymous with Islamic or any specific Arab or African religion, civilization, or ethnicity.