2022年7月27日 · Discover the fascinating story behind how Principia Mathematica took 300 pages to prove that 1 + 1 = 2, a mind-boggling proof by Bertrand Russell and Alfred Whitehead.

2013年1月15日 · The work of G. Peano shows that it's not hard to produce a useful set of axioms that can prove 1+1=2 much more easily than Whitehead and Russell do. The later theorem …

2023年5月25日 · Define 0 as the unique element in the set P ∖ s(P), where: ∖ denotes the set difference. Then: where: s(n) denotes the successor mapping. 1 is defined by hypothesis as …

假设n就是1，那么1+1=1’。 1’只要被称之为2，那么就可以得出1+1=2了。是不是很简单？ 同理，我们还可以证明1+2=3。 考虑第二条公理，假定m就是1，n也是1，那么1’+1=（1+1）’。 …

1 + 1 = 2. At the first sight, nearly all people would think that it must be insane to prove that, because it really has nothing to do. We can just put an apple and another one together, then …

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2018年1月19日 · Can you "prove" that 1 + 1 is not 2? Learn a neat trick to fool your friends.

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2018年5月8日 · 「1＋1＝2の証明が難しい」と思わせる手法. 1＋1＝2を当然のことと考えている、感覚的な人に対しては、「1＋1＝2」の意味を原始的な公理に基づいて定義し、論理記号 …

1+1=2（one plus one equals two），是初等数学范围内的数值计算等式。