Top Augustus De Morgan Quotes

Augustus De Morgan Biography

Augustus De Morgan (/dɪ ˈmɔːrɡən/; 27 June 1806 – 18 March 1871) was a British mathematician and logician. He formulated De Morgan's laws and introduced the term mathematical induction, making its idea rigorous.

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Augustus De Morgan Quotes

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 themselves, in turn, have greater fleas to go on, While these again have greater still, and greater still, and so on.

Backs, Ems, Fleas, Goes On, Greater, Littles

I don't quite hear what you say, but I beg to differ entirely with you.

Science, Quip, Quite, Hear, Say, Differ

I end with a word on the new symbols which I have employed. Most writers on logic strongly object to all symbols. . . . I should advise the reader not to make up his mind on this point until he has well weighed two facts which nobody disputes, both separately and in connexion. First, logic is the only science which has made no progress since the revival of letters; secondly, logic is the only science which has produced no growth of symbols.

Two, Mind, Growth, Object, Produced, Letters

I was x years old in the year x2.

Education, Math, Years, Year, Old

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, at his birth, he might have found room in a quart mug. He died on March the 20th, 1727, after more than eighty-four years of more than average bodily health and vigour; it is a proper pendant to the story of the quart mug to state that he never lost more than one of his second teeth.

Average, Bodily, Related, Rooms, Years

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 taken by a rational being to be capable of explanation by imposture, coincidence, or mistake.

Spiritual, Mistake, Taken, Rational, Make

I did not hear what you said, but I absolutely disagree with you.

Said, Disagree, Hear

The gambling reasoner is incorrigible; if he would but take to the squaring of the circle, what a load of misery would be saved.

Gambling, Circles, Would Be, Load, Incorrigible

The sacred writings excepted, no Greek has been so much read and so variously translated as Euclid.

Writing, Greek, Sacred, Translated, Writings, Read

As to writing another book on geometry [to replace Euclid] the middle ages would have as soon thought of composing another New Testament.

Book, Replace, Science, Writing

The moving power of mathematical invention is not reasoning but imagination.

Teacher, Moving, Math, Power, Imagination

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 no square root; thirdly that the first non-existent is to the second as the circumference of a circle is to the diameter.

Circles, Diameter, Gift, Roots, Squares, Thirdly

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 after century, is the only one which has grown no symbols.

Math, Logic, Improvement, Improvements, Thriven, Admitted

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 inconsistency or absurdity. As far as real meaning is concerned, both are imaginary, since 0 - a is as inconceivable as √(-a).

Real, Expression, Negative, Meaning, Imaginary, Inconceivable

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 his heifer; you must see with his light, if you want to know how much he saw.

Light, Read, Reading, Riddle, Science, See

Mathematicians care no more for logic than logicians for mathematics.

Care, Logic, Logicians, Mathematics

All existing things upon this earth, which have knowledge of their own existence, possess, some in one degree and some in another, the power of thought, accompanied by perception, which is the awakening of thought by the effects of external objects upon the senses.

Perception, Degrees, Earth, Thought, Existence

Common integration is only the memory of differentiation.

Education, Memories, Differentiation, Memory, Common, Integration

The Astronomer's Drinking Song Astronomers! What can avail Those who calumniate us; Experiment can never fail With such an apparatus.

Astronomers, Astronomy, Drinking, Song

[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 the founders of the Astronomical Society, and his attention to its affairs was as accurate and minute as if it had been a firm of which he was the chief clerk, with expectation of being taken into partnership.

Taken, Science, Expectations, Nineteenth, Baily, History

Augustus De Morgan Biography

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