George Peacock (1791–1858) Scottish mathematician
Vol. I: Arithmetical Algebra Preface, p. vi-vii
A Treatise on Algebra (1842)
Source: Presidential Address British Association for the Advancement of Science, Section A (1910), p. 287; Cited in: Robert Edouard Moritz. Memorabilia mathematica; or, The philomath's quotation-book https://archive.org/stream/memorabiliamathe00moriiala#page/4/mode/2up, (1914), p. 5: Definitions and objects of mathematics.
George Peacock (1791–1858) Scottish mathematician
Vol. I: Arithmetical Algebra Preface, p. vi-vii
A Treatise on Algebra (1842)
George Peacock (1791–1858) Scottish mathematician
Vol. II: On Symbolical Algebra and its Applications to the Geometry of Position (1845) Ch. XV, p. 59
A Treatise on Algebra (1842)
Christian Heinrich von Dillmann (1829–1899) German educationist
Source: Die Mathematik die Fackelträgerin einer neuen Zeit (Stuttgart, 1889), p. 37.
Willem de Sitter (1872–1934) Dutch cosmologist
Kosmos (1932), Above is Beginning Quote of the Last Chapter: Relativity and Modern Theories of the Universe -->
George Boole (1815–1864) English mathematician, philosopher and logician
Source: 1840s, The Mathematical Analysis of Logic, 1847, p. iii
Context: That to the existing forms of Analysis a quantitative interpretation is assigned, is the result of the circumstances by which those forms were determined, and is not to be construed into a universal condition of Analysis. It is upon the foundation of this general principle, that I purpose to establish the Calculus of Logic, and that I claim for it a place among the acknowledged forms of Mathematical Analysis, regardless that in its object and in its instruments it must at present stand alone.
Nicholas Murray Butler (1862–1947) American philosopher, diplomat, and educator
Editor's Introduction, The Teaching of Elementary Mathematics https://books.google.com/books?id=NKoAAAAAMAAJ (1906) by David Eugene Smith
David Eugene Smith (1860–1944) American mathematician
David Eugene Smith, "Editor's Introduction," in: The Teaching of Elementary Mathematics https://books.google.com/books?id=NKoAAAAAMAAJ (1906)
Walter A. Shewhart (1891–1967) American statistician
[Shewhart, Walter A., Deming, William E., Statistical Method from the Viewpoint of Quality Control, The Graduate School, The Department of Agriculture, 1939, 18]
Economic Control of Quality of Manufactured Product,1931
Charles W. Morris (1903–1979) American philosopher
Source: "Foundations of the Theory of Signs," 1938, p. 58-59 as cited in: Adam Schaff (1962). Introduction to semantics, p. 88-89
Bertrand Russell (1872–1970) logician, one of the first analytic philosophers and political activist
Principles of Mathematics (1903), Ch. I: Definition of Pure Mathematics, p. 3
1900s