„When… we have a series of values of a quantity which continually diminish, and in such a way, that name any quantity we may, however small, all the values, after a certain value, are severally less than that quantity, then the symbol by which the values are denoted is said to diminish without limit. And if the series of values increase in succession, so that name any quantity we may, however great, all after a certain point will be greater, then the series is said to increase without limit. It is also frequently said, when a quantity diminishes without limit, that it has nothing, zero or 0, for its limit: and that when it increases without limit it has infinity or ∞ or 1⁄0 for its limit.“

Introductory Chapter, pp.9-10
The Differential and Integral Calculus (1836)

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Augustus De Morgan Foto
Augustus De Morgan8
1806 - 1871

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„We cannot diminish the value of one category of human life — the unborn — without diminishing the value of all human life.“

—  Ronald Reagan American politician, 40th president of the United States (in office from 1981 to 1989) 1911 - 2004

1980s, First term of office (1981–1985), Abortion and the Conscience of the Nation (1983)

„A quantity growing exponentially toward a limit reaches that limit in a surprisingly short time.“

—  Donella Meadows American environmental scientist, teacher, and writer 1941 - 2001

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„Rather, for all objects and experiences there is a quantity that has an optimum value. Above that quantity, the variable becomes toxic. To fall below that value is to be deprived.“

—  Gregory Bateson English anthropologist, social scientist, linguist, visual anthropologist, semiotician and cyberneticist 1904 - 1980

Fuente: Mind and Nature: A Necessary Unity, 1979, p. 56

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„The demand for money is regulated entirely by its value, and its value by its quantity.“

—  David Ricardo British political economist, broker and politician 1772 - 1823

Fuente: The Principles of Political Economy and Taxation (1821) (Third Edition), Chapter XIII, Taxes on Gold, p. 123

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„The quantity of force which can be brought into action in the whole of Nature is unchangeable, and can neither be increased nor diminished.“

—  Hermann von Helmholtz physicist and physiologist 1821 - 1894

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„Hence the Public has the Right of Regulating Descents & all other Conveyances of Property, and even of limiting the Quantity & the Uses of it.“

—  Benjamin Franklin American author, printer, political theorist, politician, postmaster, scientist, inventor, civic activist, statesman,... 1706 - 1790

Letter http://www.franklinpapers.org/franklin/framedVolumes.jsp to Robert Morris (25 December 1783).
Contexto: All Property indeed, except the Savage’s temporary Cabin, his Bow, his Matchcoat, and other little Acquisitions absolutely necessary for his Subsistence, seems to me to be the Creature of publick Convention. Hence the Public has the Right of Regulating Descents & all other Conveyances of Property, and even of limiting the Quantity & the Uses of it. All the Property that is necessary to a Man for the Conservation of the Individual & the Propagation of the Species, is his natural Right which none can justly deprive him of: But all Property of the Publick, who by their Laws have created it, and who may therefore by other Laws dispose of it, whenever the Welfare of the Publick shall demand such Disposition. He that does not like civil Society on these Terms, let him retire & live among Savages. — He can have no right to the Benefits of Society who will not pay his Club towards the Support of it.

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„The value of money is in proportion to the quantity of the necessaries of life which it will purchase.“

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

Fuente: (1776), Book V, Chapter II, Part II, Article IV.

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—  Ludwig von Mises austrian economist 1881 - 1973

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