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
Horus Bird (Pharaoh) the existence of one or more ephemeral rulers following Qa'a's death and before Hotepsekhemwy of which Horus-Bird may have been one. Egyptologists such as Černý and Peter Kaplony think that Horus-Bird could be identical to the likewise sparsely attested King Horus-Ba. Indeed, this ruler wrote his name with the leg sign or the leg and ram signs, which read "Ba". Černý and Kaplony think that the bird in the serekh of Horus-Bird is the goose sign with the same transcription, "Ba". In this case Horus-Ba and Horus "Bird" could be the same historical figure. Černý and Kaplony's theory is not