Жозеф Луи Лагранж цитаты
Жозеф Луи Лагранж: Цитаты на английском языке
Letter to d'Alembert (1781) cited in R. Laubenbacher, D. Pengelly: Mathematical Expeditions: Chronicles by the Explorers (1999) Springer, pp. 233–234.
Dans Les Leçons Élémentaires sur les Mathématiques (1795) Leçon cinquiéme, Tr. McCormack, cited in Moritz, Memorabilia mathematica or, The philomath's quotation-book (1914) Ch. 15 Arithmetic, p. 261. https://archive.org/stream/memorabiliamathe00moriiala#page/260/mode/2up
Dans Les Leçons Élémentaires sur les Mathématiques (1795) Leçon cinquiéme,Tr. McCormack, cited in Robert Edouard Moritz, Memorabilia mathematica or, The philomath's quotation-book (1914) Ch. V The teaching of mathematics, p. 81. https://archive.org/stream/memorabiliamathe00moriiala#page/80/mode/2up
Mécanique analytique (1788) as quoted by E. W. Hobson, Mathematics, from the points of view of the Mathematician and of the Physicist (1912) an address delivered to the Mathematical and Physical Society of University College London, p.13. https://books.google.com/books?id=H7Y_AQAAIAAJ&pg=PA13
As quoted by F. R. Moulton, Introduction to Astronomy (New York, 1906), p. 199.
As quoted by William Hughes, Annual Editions: Western Civilization (1997) p. 64; about the beheading of his friend Antoine Lavoisier.