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.
Moor is a term used in Medieval Europe. A moor is a Muslim from Africa. Most moors were from northern Africa (Morroco, Algeria, Tunisia, Libya & Egypt) and were olive-skinned with Mediterranean or Coptic features. Many moors were dark-skinned with African features. The term Moor is no longer in use.