%0 Journal Article %A Karine Chemla %T Fragments of a History of the Concept of Ideal. Poncelet's and Chasles's Reflections on Generality in Geometry and their Impact on Kummer's Work with Ideal Divisors %J Symmetry, integrability and geometry: methods and applications %D 2024 %V 20 %U http://geodesic.mathdoc.fr/item/SIGMA_2024_20_a65/ %G en %F SIGMA_2024_20_a65