Mathematicians Of The Day

16th October



On this day in 1843, William Hamilton realised how to multiply together quaternions and carved the formulae on a canal bridge in Dublin.
See THIS LINK.

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Quotation of the day

From John Torrence Tate
A good theorem lasts forever. Once proved, it will always stay proved, and other mathematicians are free to use it and build on it as they please, sometimes to great effect.