Augustus De Morgan Quotes

25 quotes in 505 categories

• During the last two centuries and a half, physical knowledge has been gradually made to rest upon a basis which it had not before. It…
• [About Francis Baily] The history of the astronomy of the nineteenth century will be incomplete without a catalogue of his labours. He was one of…
• Common integration is only the memory of differentiation...
• I was x years old in the year x2.
• Imagine a person with a gift of ridicule [He might say] First that a negative quantity has no logarithm; secondly that a negative quantity has…
• Lagrange, in one of the later years of his life, imagined that he had overcome the difficulty (of the parallel axiom). He went so far…
• The imaginary expression √(-a) and the negative expression -b, have this resemblance, that either of them occurring as the solution of a problem indicates some…
• The moving power of mathematical invention is not reasoning but imagination.
• The gambling reasoner is incorrigible; if he would but take to the squaring of the circle, what a load of misery would be saved.
• It is easier to square a circle than to get round a mathematician.
• I am perfectly convinced that I have both seen, and heard in a manner which should make unbelief impossible, things called spiritual which cannot be…
• Great fleas have little fleas upon their backs to bite 'em, And little fleas have lesser fleas, and so ad infinitum, And the great fleas…
• The sacred writings excepted, no Greek has been so much read and so variously translated as Euclid.
• Mathematicians care no more for logic than logicians for mathematics.
• Every science that has thriven has thriven upon its own symbols: logic, the only science which is admitted to have made no improvements in century…
• I end with a word on the new symbols which I have employed. Most writers on logic strongly object to all symbols. ... I should…
• Isaac Newton was born at Woolsthorpe, near Grantham, in Lincolnshire, on Christmas Day, 1642: a weakly and diminutive infant, of whom it is related that,…
• It was long before I got at the maxim, that in reading an old mathematician you will not read his riddle unless you plough with…
• We know that mathematicians care no more for logic than logicians for mathematics. The two eyes of science are mathematics and logic; the mathematical set…
• Common integration is only the memory of differentiation... The different artifices by which integration is effected, are changes, not from the known to the unknown,…

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