Prague: J.G. Calve, 1835-36. The memoire in which Cauchy explained the dispersion of light from the undulatory theory of light, and first derived the equation, named after him, relating the refractive index and wavelength of light for a particular transparent material. This memoire was a continuation of his earlier work..... More about Mémoire sur la Dispersion de la Lumière. [As published in Nouveaux Exercices de Mathématiques
Item #2354

Paris: de Bure Frères, 1829. First edition, very rare, of Cauchy’s important memoir on the determination of the real roots of polynomial equations. As stated in the ‘Avertissement’, this is a (separately-paginated) offprint from Cauchy’s Exercises de Mathématiques, Quatrième Année, 1829 (journal pagination 65-128). The problem of determining the real..... More about Mémoire sur la Résolution des Équations numériques et sur la Théorie de l’Élimination
Item #4460

Paris: Chez de Bure Frères, 1825. First edition of this very rare memoir in which “Cauchy began to lay the foundations of the general theory of analytic functions of a complex variable and their integration by residues.” (Landmark Writtings in Western Mathematics, ch. 28). “This paper is considered by many..... More about Mémoire sur les intégrales définies, prises entre des limites imaginaires
Item #3163