**Alexandre Théophile Vandermonde** He was born on February 28, 1735 in Paris, France, and died on January 1, 1796, also in Paris.

His first love was music, and he turned to mathematics only when he was 35 years old. He was so close to Gaspard Monge that he became known as Monk's femme.

Vandermonde studied the theory of equations and worked with determinants, although the determinants named after him by Lebesgue do not appear in his published work.

He also worked on the mathematical solution of a problem called *knight's tour problem*. His total contributions to mathematics were 4 memoirs written between 1771 and 1772, which contain important results and methods.