“Proofs of the Euclidean [parallel] postulate can be developed to such an extent that apparently a mere trifle remains. But a careful analysis shows that in this seeming trifle lies the crux of the matter; usually it contains either the proposition that is being proved or a postulate equivalent to it.”
Quote by Johann Heinrich Lambert
Author
Johann Heinrich Lambert
Johann Heinrich Lambert, born on August 26, 1728, and died on September 25, 1777, was a German mathematician, astronomer, and philosopher. He made significant contributions to mathematics, particularly in number theory and optics. more