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I'm self-learning Linear Algebra and have been trying to take a geometric approach to understand what matrices mean visually I've noticed this matrix product pop up repeatedly and can't seem to de
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Why is 1 i 1 i equal to −i i? Ask Question Asked 10 years, 1 month ago Modified 6 months ago Viewed 113k times
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Why is 1 1 not considered a prime number? Or, why is the definition of prime numbers given for integers greater than 1 1?
- 总是听说降雨量多少毫米这样，那想请问一下降雨量1毫米是什么概念？ - 知乎
实际上，天气预报中所说的雨量跟公众了解的积水深度并不能完全等同。 气象上一般把连续24小时，降水量50毫米以上的雨叫暴雨。 我们先以1毫米降水为例，看看小雨的威力。 首先，1毫米雨，看上去微乎其微，但如果降雨的范围（面积）很大，雨量也很可观。
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- 知乎 - 有问题，就会有答案
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- abstract algebra - Prove that 1+1=2 - Mathematics Stack Exchange
Possible Duplicate: How do I convince someone that $1+1=2$ may not necessarily be true? I once read that some mathematicians provided a very length proof of $1+1=2$ Can you think of some way to
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