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.
15 Things You Did Not Know About the Moors of Spain. 1. The Spanish occupation by the Moors began in 711 AD when an African army, under their leader Tariq ibn-Ziyad, crossed the Strait of Gibraltar from northern Africa and invaded the Iberian peninsula âAndalus' (Spain under the Visigoths). 2.