Albert Girard
#23,223
Most Influential Person Across History
French mathematician
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Mathematics
Why Is Albert Girard Influential?
(Suggest an Edit or Addition)According to Wikipedia, Albert Girard was a French-born mathematician. He studied at the University of Leiden. He "had early thoughts on the fundamental theorem of algebra" and gave the inductive definition for the Fibonacci numbers. He was the first to use the abbreviations 'sin', 'cos' and 'tan' for the trigonometric functions in a treatise. Girard was the first to state, in 1625, that each prime of the form 1 mod 4 is the sum of two squares. It was said that he was quiet-natured and, unlike most mathematicians, did not keep a journal for his personal life.
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