"The physicists didn't want to be bothered with the idea that maybe quantum theory is only provisional. A horn of plen…"

"Now Gödel's proof, Russell's original paradox, all these things, all stem from one common root which is inherent in a…"

"In the summer of 1914 I attended Frege's course, Logik in der Mathematik. Here he examined critically some of the cus…"

"On the subject of demonstrations, it is to be remarked that the Hindu mathematicians proved propositions both algebra…"

"Pythagoras did not possess a proof of the theorem which bears his name... he was temperamentally uninterested in proo…"

"Proof is the idol before whom the pure mathematician tortures himself."

"Another roof, another proof."

"It really is worth the trouble to invent a new symbol if we can thus remove not a few logical difficulties and ensure…"

"The ideal of strictly scientific method in mathematics which I have tried to realise here, and which perhaps might be…"

"The great masters of modern analysis are Lagrange, Laplace, and Gauss, who were contemporaries. It is interesting to …"