Paris, Firmin Didot, 1823. Cont. hcalf. Blindtooling to back. (6),431 pp. and 14 folded engraved plates.
Reference : 31111
Importent 12th edition of Legendre's ""Elements"". He worked on the Euclidean parallell postulate over a period of about 20 years, and his various results with and attacks on the problem, appeared in the different editions of his ""Elements"". This 12th edition having L.'s demonstration of angle sum by a series of triangles with the same area and angle-sum, not in the previous editions. (Sommerville: Non-Euclidean Geometry 1823:Legendre).
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1837 Firmin Didot Paris 1837 IN8 , 1/2 chagrin vert , dos lisse richement orné , 431pp , 5 planches dépliantes hors texte.
A Paris, Didot, 1823. 429 pages. 14 planches dépliantes illustrées. (20x13cm) Pleine basane. Frottements au dos et aux bords. Reliure en mauvais état. Rousseurs à l'intérieur. Quelques taches. Quelques notes manuscrites au crayon.
Paris, Frimin Didot, Père et Fils 1823, 215x135mm, 431pages, broché. Couverture muette. Etiquette de titre imprimé au dos. Tranches non rognées. Dos fendu. Intérieur en bon état. A faire relier.
14 planches en n/b,