Isaac
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- 179 Is it true that $0.999999999\dots=1$?
- 159 Why $\sqrt{-1 \cdot {-1}} \neq \sqrt{-1}^2$?
- 147 How to prove Euler's formula: $e^{i\varphi}=\cos(\varphi) +i\sin(\varphi)$?
- 130 Is there a general formula for solving 4th degree equations (quartic)?
- 98 Convert HTML entities to Unicode and vice versa
- 83 Proof that the irrational numbers are uncountable
- 69 Proving that 1- and 2-d simple symmetric random walks return to the origin with probability 1
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