Émile Lemoine, Date of Birth, Place of Birth, Date of Death

Émile Lemoine

French mathematician and civil engineer

Date of Birth: 22-Nov-1840

Place of Birth: Quimper, Brittany, France

Date of Death: 21-Dec-1912

Profession: engineer, mathematician, university teacher, civil engineer

Nationality: France

Zodiac Sign: Sagittarius

Émile Michel Hyacinthe Lemoine (French: [emil l?mwan]; 22 November 1840 – 21 February 1912) was a French civil engineer and a mathematician, a geometer in particular.
He was educated at a variety of institutions, including the Prytanée National Militaire and, most notably, the École Polytechnique.
Lemoine taught as a private tutor for a short period after his graduation from the latter school. Lemoine is best known for his proof of the existence of the Lemoine point (or the symmedian point) of a triangle.
Other mathematical work includes a system he called Géométrographie and a method which related algebraic expressions to geometric objects.
He has been called a co-founder of modern triangle geometry, as many of its characteristics are present in his work. For most of his life, Lemoine was a professor of mathematics at the École Polytechnique.
In later years, he worked as a civil engineer in Paris, and he also took an amateur's interest in music.
During his tenure at the École Polytechnique and as a civil engineer, Lemoine published several papers on mathematics, most of which are included in a fourteen-page section in Nathan Altshiller Court's College Geometry.
Additionally, he founded a mathematical journal titled, L'Intermédiaire des Mathématiciens.