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The discovery of octonions by John T. Graves, who denoted them with a boldface O, was announced to his mathematician friend William Hamilton, discoverer of quaternions, in a letter on this date.
Related Wikipedia articles
Octonion
Hypercomplex number system
In mathematics, the octonions are a normed division algebra over the real numbers, a kind of hypercomplex number system. The octonions are usually represented by the capital letter O, using boldface O or blackboard bold . Octonions have eight dimensions; twice the number of…Source: Wikipedia (CC BY-SA)
John T. Graves
Irish jurist and mathematician (1806–1870)
John Thomas Graves was an Irish jurist and mathematician. He was a friend of William Rowan Hamilton, and is credited both with inspiring Hamilton to discover the quaternions in October 1843 and then discovering their generalization the octonions himself later that same year. He…Source: Wikipedia (CC BY-SA)
William Rowan Hamilton
Irish mathematician, physicist, and astronomer (1805–1865)
Sir William Rowan Hamilton was an Irish mathematician, physicist, and astronomer who made numerous major contributions to abstract algebra, classical mechanics, and optics. His theoretical works and mathematical equations are considered fundamental to modern theoretical physics,…Source: Wikipedia (CC BY-SA)
Quaternion
Noncommutative extension of the complex numbers
In mathematics, the quaternion number system extends the complex numbers. Quaternions were first described by the Irish mathematician William Rowan Hamilton in 1843 and applied to mechanics in three-dimensional space. The set of all quaternions is conventionally denoted by , or…Source: Wikipedia (CC BY-SA)
December 26
Day of the year
December 26 is the 360th day of the year in the Gregorian calendar; five days remain until the end of the year.Source: Wikipedia (CC BY-SA)