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.
[Ér ËheËn ËÉÉ¡lÉÃ°]), in English the Old North, is the region of Northern England and the southern Scottish Lowlands inhabited by Celtic Britons during the post-Roman period and the Early Middle Ages. Its denizens spoke a variety of the Brittonic language known as Cumbric.