Geneviève Guitel was a French

French people

The French are a nation that share a common French culture and speak the French language as a mother tongue. Historically, the French population are descended from peoples of Celtic, Latin and Germanic origin, and are today a mixture of several ethnic groups...

 mathematician

Mathematician

A mathematician is a person whose primary area of study is the field of mathematics. Mathematicians are concerned with quantity, structure, space, and change....

. She is mostly remembered for her introduction of the terms échelle longue and échelle courte ("long scale" and "short scale"

Long and short scales

The long and short scales are two of several different large-number naming systems used throughout the world for integer powers of ten. Many countries, including most in continental Europe, use the long scale whereas most English-speaking countries use the short scale...

 respectively) to refer to two of the main numbering systems used around the world. She was appointed as Mathematics teacher in 1920 and taught at the Lycée Molière in Paris. . She published mathematical papers over at least the period 1943-1979.

Her publications include Histoire comparée des numérations écrites, where on p. 51-52 and in the chapter "Les grands nombres en numération parlée", p. 566-574, (English: The large numbers in oral numeration), she made the first recorded use of the terms échelle longue and échelle courte.

Publications

Histoire comparée des numérations écrites, Geneviève Guitel, Éd. Flammarion, Paris, 1975 ISBN 10-2082111040 and ISBN 13-978-2082111041