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.
North York Moors. The North York Moors is a national park in North Yorkshire, England, containing one of the largest expanses of heather moorland in the United Kingdom. It covers an area of 554 sq mi (1,430 km2), and has a population of 23,380.