Immanuel Kant book Metaphysical Foundations of Natural Science
Preface, Tr. https://books.google.com/books?id=OCJLAAAAMAAJ Ernest Belfort Bax (1883) <br class="br">Metaphysical Foundations of Natural Science (1786)
System of positive polity (1852)
Immanuel Kant book Metaphysical Foundations of Natural Science
Preface, Tr. https://books.google.com/books?id=OCJLAAAAMAAJ Ernest Belfort Bax (1883) <br class="br">Metaphysical Foundations of Natural Science (1786)
Ludwig von Bertalanffy (1901–1972) austrian biologist and philosopher
General System Theory (1968), 4. Advances in General Systems Theory
George Frederick James Temple (1901–1992) British mathematician
100 Years of Mathematics: a Personal Viewpoint (1981)
Marilyn Ferguson (1938–2008) American writer
The Aquarian Conspiracy (1980), Chapter Six, Liberating Knowledge: News from the Frontiers of Science
Joseph von Fraunhofer (1787–1826) German optical physicist
In The Wave Theory, Light and Spectra. Prismatic and Diffraction Spectra. Memoirs by Joseph Von Fraunhofer (1981), p. 14 ISBN 0-405-13867-9
Henri Poincaré book Science and Hypothesis
Source: Science and Hypothesis (1901), Ch. I. (1905) Tr. George Bruce Halstead
Context: This procedure is the demonstration by recurrence. We first establish a theorem for n = 1; then we show that if it is true of n - 1, it is true of n, and thence conclude that it is true for all the whole numbers... Here then we have the mathematical reasoning par excellence, and we must examine it more closely.
... The essential characteristic of reasoning by recurrence is that it contains, condensed, so to speak, in a single formula, an infinity of syllogisms.
... to arrive at the smallest theorem [we] can not dispense with the aid of reasoning by recurrence, for this is an instrument which enables us to pass from the finite to the infinite.
This instrument is always useful, for, allowing us to overleap at a bound as many stages as we wish, it spares us verifications, long, irksome and monotonous, which would quickly become impracticable. But it becomes indispensable as soon as we aim at the general theorem...
In this domain of arithmetic,.. the mathematical infinite already plays a preponderant rôle, and without it there would be no science, because there would be nothing general.<!--pp.10-12
Bertrand Russell (1872–1970) logician, one of the first analytic philosophers and political activist
Source: 1910s, Introduction to Mathematical Philosophy (1919), Ch. 18: Mathematics and Logic
John Von Neumann (1903–1957) Hungarian-American mathematician and polymath
"The Role of Mathematics in the Sciences and in Society" (1954) an address to Princeton alumni, published in John von Neumann : Collected Works (1963) edited by A. H. Taub <!-- Macmillan, New York -->; also quoted in Out of the Mouths of Mathematicians : A Quotation Book for Philomaths (1993) by R. Schmalz
Context: A large part of mathematics which becomes useful developed with absolutely no desire to be useful, and in a situation where nobody could possibly know in what area it would become useful; and there were no general indications that it ever would be so. By and large it is uniformly true in mathematics that there is a time lapse between a mathematical discovery and the moment when it is useful; and that this lapse of time can be anything from 30 to 100 years, in some cases even more; and that the whole system seems to function without any direction, without any reference to usefulness, and without any desire to do things which are useful.