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Argand, Jean Robert

Born: 1768 AD
Died: 1822 AD

1768 – Born on the 18th of July.

1806 – While managing a bookstore in Paris, he published the idea of geometrical interpretation of complex numbers known as the Argand diagram.

         – He published a rigorous proof of the fundamental theorem of algebra.

1822 – Deid on the 13th of August.