Frasi di Joseph-Louis Lagrange (11 frasi) | Citazioni e frasi celebri

Joseph-Louis Lagrange: 11 frasi 2 Mi piace

Joseph-Louis Lagrange frasi celebri

“[Disse del chimico Lavoisier] Alla folla è bastato un attimo per rimuovere la sua testa; un secolo non basterà per riprodurla.”

Joseph-Louis Lagrange

“Ho quasi completato un Trattato di meccanica analitica basato unicamente sul principio delle velocità virtuali; ma visto che ancora non so quando e dove sarà possibile darlo alle stampe, non mi sto affrettando per rifinire le ultime cose.”

Joseph-Louis Lagrange

“[In prefazione alla sua "Meccanica Analitica"] Il lettore non troverà neanche una cifra in questo lavoro. I metodi che ho portato avanti non richiedono né costruzioni né ragionamenti meccanici o geometrici: ma solo operazioni algebriche, soggette a una procedura normale ed uniforme.”

Joseph-Louis Lagrange

“Quando chiediamo un consiglio, stiamo di solito cercando un complice.”

Joseph-Louis Lagrange

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“Un antico scrittore disse che l'aritmetica e la geometria sono le ali della matematica; Credo si possa dire senza parlare metaforicamente che queste due scienze sono il fondamento e l'essenza di tutte le scienze che si occupano di quantità. Non solo sono le fondamenta, sono anche, per così dire, le pietre di copertura; poiché, ogni volta che si è arrivati a un risultato, per usare quel risultato, è necessario tradurlo in numeri o in righe; tradurlo in numeri richiede l'aiuto dell'aritmetica, tradurlo in linee richiede l'uso della geometria.”

Joseph-Louis Lagrange

Joseph-Louis Lagrange: Frasi in inglese

“I cannot say whether I will still be doing geometry ten years from now. It also seems to me that the mine has maybe already become too deep and unless one finds new veins it might have to be abandoned. Physics and chemistry now offer a much more glowing richness and much easier exploitation. Also, the general taste has turned entirely in this direction, and it is not impossible that the place of Geometry in the Academies will someday become what the role of the Chairs of Arabic at the universities is now.”

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Joseph Louis Lagrange

Letter to d'Alembert (1781) cited in R. Laubenbacher, D. Pengelly: Mathematical Expeditions: Chronicles by the Explorers (1999) Springer, pp. 233–234.

“An ancient writer said that arithmetic and geometry are the wings of mathematics; I believe one can say without speaking metaphorically that these two sciences are the foundation and essence of all the sciences which deal with quantity. Not only are they the foundation, they are also, as it were, the capstones; for, whenever a result has been arrived at, in order to use that result, it is necessary to translate it into numbers or into lines; to translate it into numbers requires the aid of arithmetic, to translate it into lines necessitates the use of geometry.”

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Joseph Louis Lagrange

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

“As long as algebra and geometry proceeded along separate paths, their advance was slow and their applications limited. But when these sciences joined company, they drew from each other fresh vitality and thenceforward marched on at a rapid pace toward perfection.”

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Joseph Louis Lagrange

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

“We have already various treatises on Mechanics, but the plan of this one is entirely new. I intend to reduce the theory of this Science, and the art of solving problems relating to it, to general formulae, the simple development of which provides all the equations necessary for the solution of each problem. I hope that the manner in which I have tried to attain this object will leave nothing to be desired. No diagrams will be found in this work. The methods that I explain require neither geometrical, nor mechanical, constructions or reasoning, but only algebraical operations in accordance with regular and uniform procedure. Those who love Analysis will see with pleasure that Mechanics has become a branch of it, and will be grateful to me for having thus extended its domain.”

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Joseph Louis Lagrange libro Mécanique analytique

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