„It is worth pointing out that in this particular study our authors have abandoned demand and supply functions as a tool for analysis, even as applied to individuals… [The problem] has been reformulated as one of proving that a number of maximizations of individual goals under interdependent restraints can be simultaneously carried out.“

Fonte: Three Essays (1957), p. 60, as cited in: Mitra-Kahn, Benjamin H. "General Equilibrium Theory, its history and its relation (if any) to the Market Economy." (2005).

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Tjalling Koopmans
1910 - 1985

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„This is our problem as modern 'enlightened' individuals, for whom all gods and devils have been rationalized out of existence“

—  Joseph Campbell, livro The Hero with a Thousand Faces

Fonte: The Hero with a Thousand Faces (1949), Chapter 2, page 87 (New World Library, 2008)
Contexto: (...) we today (in so far as we are unbelievers, or, if believers, in so far as our inherited beliefs fail to represent the real problems of contemporary life) must face alone, or, at best, with only tentative, impromptu, an not often very effective guidance. This is our problem as modern 'enlightened' individuals, for whom all gods and devils have been rationalized out of existence.

„Sometimes, where a complex problem can be illuminated by many tools, one can be forgiven for applying the one he knows best.“

—  Robert E. Machol American systems engineer 1917 - 1998

Cited in: Paul Dickson (1999) The official rules and explanations. p. 164
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„The second period, which commenced in the middle of the seventeenth century, and lasted for about a century, was characterized by the application of the powerful analytical methods provided by the new Analysis to the determination of analytical expressions for the number π in the form of convergent series, products, and continued fractions. The older geometrical forms of investigation gave way to analytical processes in which the functional relationship as applied to the trigonometrical functions became prominent. The new methods of systematic representation gave rise to a race of calculators of π, who, in their consciousness of the vastly enhance means of calculation placed in their hands by the new Analysis, proceeded to apply the formulae to obtain numerical approximations to π to ever larger numbers of places of decimals, although their efforts were quite useless for the purpose of throwing light upon the true nature of that number. At the end of this period no knowledge had been obtained as regards the number π of the kind likely to throw light upon the possibility or impossibility of the old historical problem of the ideal construction; it was not even definitely known whether the number is rational or irrational. However, one great discovery, destined to furnish the clue to the solution of the problem, was made at this time; that of the relation between the two numbers π and e, as a particular case of those exponential expressions for the trigonometrical functions which form one of the most fundamentally important of the analytical weapons forged during this period.“

—  E. W. Hobson British mathematician 1856 - 1933

Fonte: Squaring the Circle (1913), pp. 11-12

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Camille Pissarro photo

„I wish it to be thoroughly under stood that it is Mr. Seurat, an artist of great worth, who has been the first to conceive the idea of applying the scientific theory after making a profound study of it. I have only followed, like my confreres, the example set by Seurat.“

—  Camille Pissarro French painter 1830 - 1903

Quote in an autograph letter 6 Nov. 1886, to Mr. Durand; as quoted in Brush and Pencil, Vol. XIII, no. 6 , article: 'Camille Pissarro' Impressionist'; by Henry G Stephens, March, 1904, pp. 412-13

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„Problems worthy of attacks, prove their worth by hitting back“

—  Adam Smith Scottish moral philosopher and political economist 1723 - 1790

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„Problems worthy
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—  Piet Hein Danish puzzle designer, mathematician, author, poet 1905 - 1996


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