Jean Frédéric Frenet (French: [fʁənɛ]; 7 February 1816 – 12 June 1900) was a French mathematician, astronomer, and meteorologist.
He wrote six out of the nine formulas, which at that time were not expressed in vector notation.
These formulas are important in the theory of space curves (differential geometry), and they were presented in his doctoral thesis at Toulouse in 1847.
He also was director of an astronomical observatory at Lyon.
Four years later, in 1852, he published the Frenet formulas in the Journal de Mathématiques Pures et Appliquées.