Girard, Albert

Girard, Albert

 

Born 1595 in Saint-Mihiel; died 1632 in The Hague. Dutch mathematician. Student of S. Stevin.

Girard was the first to state the fundamental theorem of algebra; he also examined negative and imaginary roots of equations on a par with positive roots. In his Treatise on Trigonometry (1626) he systematized all the theorems of plane and spherical trigonometry known up to that time.

REFERENCES

Wileitner, H.lstoriia matematiki ot Dekarta do serediny 19 stoletiia, 2nd ed. Moscow, 1966. (Translated from German.)
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Arthur leaves his loving wife Muriel, of forty years; his children, Jeffery Mitchell, Mark Mitchell, Victoria Samson, Jennifer Beaudoin, and Timothy Mitchell, Kathy Libby, Marie Valis, Deborah Girard, Albert Theriault, Cindy Tamkus, and Laurie Landstorm ; 38 grandchildren; 44 great grandchildren and 3 great great grandchildren.