Irish physicist, astronomer, and mathematician Sir William Rowan Hamilton introduced quaternions, a non-commutative extension of complex numbers, on October 16, 1843. Benjamin Olinde Rodrigues had ...
I WISH to make some observations in reply to the letter of Prof. Knott which appeared in NATURE (June 15, p. 148). For my part I have nowhere condemned the system of Hamilton and Tait as “unnatural” ...
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