Eye of Horus fractions were written as the sum of two or more unit fractions (a fraction with 1 as the numerator), with scribes possessing tables of answers (see Rhind Mathematical Papyrus 2/n table). Thus instead of , one would write + . Different parts of the Eye of Horus were thought to be used by the ancient Egyptians to represent one divided by the first six powers of two: The Rhind Mathematical Papyrus contains tables of "Horus Eye Fractions". Studies from the 1970s to this day in Egyptian mathematics have clearly shown this theory was fallacious and Jim Ritter definitely showed it
Four sons of Horus Pharaoh was seen as a manifestation of, or especially protected by, Horus, these "parts" of the deceased pharaoh, referred to as the Osiris, were seen as "parts" of Horus, or rather, his "children", an association that did not diminish with each successive pharaoh. Since Horus was their father, so Isis, Horus's original wife in the early mythological phase, was usually seen as their mother, although Hathor was also believed to be their mother, though in the details of the funerary ritual each son, and therefore each canopic jar, was protected by a particular goddess. Others say their mother was Serket,