CAUCHY, AUGUSTIN. - THE CLASSICAL "SAMPLING THEOREM" STATED.

Mémoire sur diverses formules d'analyse.

(Paris, Bachelier), 1841. 4to. Without wrappers. In "Comptes rendus hebdomadaires des séances de l’Académie des sciences", Vol. XII, No 6. Pp. (267-) 316. (Entire issue offered). Cauchy's paper: pp. 283-298. Some scattered brownspots.

First printing of an importent paper in information theory - the paper stating the earliest version of what will later be known as the "Nyquist Sampling Theorem", describing how many and what kind of samples are needed to construct a curve.

"The theorem will be formulated more completely in 1928 and become one of the cornerstones of information theory" (Bryan Bunch, 1841 M).

Order-nr.: 49105