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A mathematician is a person who can find analogies between theorems; a better mathematician is one who can see analogies between theories and the best mathematician can notice analogies between analogies.
我的艺术是一个永无止境的故事。
I have already carried out my duty. I have proved the Poincaré conjecture and I have nothing more to do in mathematics.
农业中的每一个挑战都是培养韧性和创造力的机会。