‎Fontenelle‎
‎Eléments de la géométrie de l'infini‎

‎Eléments de la géométrie de l'infini-- EDITION ORIGINALE -- BEL EXEMPLAIRE‎

‎P., Imprimerie Royale, 1727, un volume grand in 4 (26 cm x 19,5 cm) relié en plein veau marbré, dos orné de fers dorés, tranches rouges (reliure de l'époque), (13), 548pp., 1 PLANCHE DEPLIANTE‎

‎---- EDITION ORIGINALE ---- BEL EXEMPLAIRE GRAND DE MARGES ---- Ex-LIBRIS HENRI DE JUVENEL ---- "As a member of the Academy of Sciences, FONTENELLE also wished to do work of his own. In 1727, as a "Suite des mémoires de l'Académie royale des sciences", he published the ELEMENTS DE LA GEOMETRIE DE L'INFINI... He had worked on it for a long time, probably since the period of his preface to the Analyse des infiniment petits. The term élémens is to be understood in the sense of "first principles". According to FONTENELLE, none of the geometers who had invented or employed the calculus of infinity had given a general theory of it. That is what he proposed to do. The work is divided into a preface relating the history of this branch of calculus and into two main parts : Système général de l'infini and Différentes applications ou remarques". (DSB V p. 61)21420/2142/N1‎

‎Élements de la geometrie de L'Infini. Suite des Memoires de l'Academie des Sciences.‎

‎Paris, L'Imprimerie Royale, 1727. 4to. Fine contemp. full calf. Raised bands. Richly gilt spine. Tome- and titlelabels with gilt lettering. Gilt borders on covers. A small nick in leather at upper compartmen. Light wear to foot of spine. (26),548, pp., 1 folded engraved plate. Clean and fine. The offered item includes the entire volume of ""Histoire de L'Academie Royale des Sciences. Années MDCCXXV. Paris, L'Imprimerie Royale, 1727"", of which the memoir of Fontenelle is printed as a ""suite"". With the engraved frontispiece. (6),154,354,(2) pp., 14 partly folded engraved plates. (Original papers by: Maraldi, Petit, Nicole, Winslow, du Fay, Pitot, Delisle d'Aine, Geoffroy le Cadet, Reaumur, Nicole, Cassini, de Mairan, Saurin, de Lagny, Fizes).‎

‎First edition. ""In 1727, as a ""Suite des mémoires de l’Académie royale des sciences,"" he published the Élémens de la géométrie de l’infini. Some doubted whether it was really the work of a mathematician, but the author believed it was and attached great value to it. He had worked on it for a long time, probably since the period of his preface to the Analyse des infiniment petits. The term élémens is to be understood in the sense of ""first principles."" According to Fontenelle, none of the geometers who had invented or employed the calculus of infinity had given a general theory of it"" that is what he proposed to do. The work is divided into a preface relating the history of this branch of calculus and into two main parts: ""Système général de l’infini"" and ""Différentes applications ou remarques."" The author discusses ""the infinite in series or in progressions of numbers"" and then examines ""the infinite in straight and curved lines,"" in the words of the Abbé Terrasson, who reviewed the work in the Journal des sçavans (July-October 1728)."" There was a great deal of discussion in the scientific community about this work, in which mathematicians found numerous paradoxes. Johann I Bernoulli, for example, in his correspondence with Fontenelle allowed his criticisms to show through his praise: he did not understand what was meant by finis indéterminables. Fontenelle attempted to defend his theory and above all his distinction between metaphysical infinity and geometric infinity: one must ignore the metaphysical difficulties in order to further geometry, and the finis indéterminables ought to be considered ""as a type of hypothesis necessary until now in order to explain several phenomena of the calculus"" (letter to Johann I Bernoulli, 29 June 1729). ""The orders of infinite and indeterminable quantities, like the magnitudes that they represent, are only purely relative entities, hypothetical and auxiliary. The subject matter of mathematics is only ideal,"" according to the terms of a ""Projet de rapport"" of Dortous de Mairan to the Academy on this work."" (DSB).‎

‎Elemens (éléments) de la géométrie de l'infini. Suite des Mémoires de l'Académie Royale des Sciences.‎

‎ Imprimerie royale 1727 in-4 A Paris, De L'imprimerie Royale, 1727, 1 volume in-quarto de 195x245 mm environ, (13) ff., 548 pages, complet de la planche dépliante in-fine. Pleine reliure d'époque, dos à cinq nerfs portant titre doré sur pièces de cuir rouge et caissons ornés, roulette dorée sur les coupes, tranches mouchetées de rouge, gardes blanches. Bel et solide exemplaire malgré les défauts à signaler, coiffes absentes, coins émoussés, marques et épidermures sur les plats, mors supérieur fendu, galeries de vers marginales (plus importantes en fin de volume).‎

‎ Merci de nous contacter à l'avance si vous souhaitez consulter une référence au sein de notre librairie.‎

‎Élements de la Geometrie de L'Infini. Suite des Memoires de l'Academie Royale des Sciences. Paris, De L'Imprimerie Royale, 1727.‎

‎4to. Cont. full calf. 5 raised bands and richly gilt compartments. Faint scratches on covers. Corners and edges a little rubbed. 2 small holes in leather at sides of upper compartment. (26),548 pp. and 1 folded engraved plate. Engraved vignette. On good paper.‎

‎First edition of the well-known French philosopher and mathematician's main mathematical work. Fontenelle, author of ""The Plurality of Worlds"", claims here, that Geometry is entirely intellectual and independent of the actual decription and existence of figures, following more the conceptions of Descartes than those of Newton.‎

‎Oeuvres complètes, tome VIII : Eléments de la géométrie de l'infini‎

‎Paris, Fayard, Corpus des Oeuvres de Philosophe en langue française, 2000, Relié, 611 pages. Très bon état. ‎