Page "Sophie Germain" Paragraph 4

Germain decided that if geometry, which at that time referred to all of pure mathematics, could hold such fascination for Archimedes, it was a subject worthy of study.

So she pored over every book on mathematics in her father's library, even teaching herself Latin and Greek so she could read works like those of Sir Isaac Newton and Leonhard Euler.

She also enjoyed Traité d ' Arithmétique by Étienne Bézout and Le Calcul Différential by Jacques Antoine-Joseph Cousin.

Later, Cousin visited her in her house, encouraging her in her studies.