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Arthur Cayley —
British
Mathematician
born on August 16, 1821,
died on January 26, 1895
Arthur Cayley F.R.S. was a British mathematician. He helped found the modern British school of pure mathematics... (wikipedia)
Projective geometry is all geometry.
Not that the propositions of geometry are only approximately true, but that they remain absolutely true in regard to that Euclidean space which has been so long regarded as being the physical space of our experience.
As for everything else, so for a mathematical theory: beauty can be perceived but not explained.
But be that as it may, I think it is more respectful to you that I should speak to you upon and do my best to interest you in the subject which has occupied me, and in which I am myself most interested.
And in another point of view, I think it is right that the address of a president should be on his own subject, and that different subjects should be thus brought in turn before the meetings.