Mathematics
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Isaac

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  • Member for 10 years, 6 months
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176 Is it true that $0.999999999\dots=1$? Jul 20 '10
155 Why $\sqrt{-1 \times {-1}} \neq \sqrt{-1}^2$? Jul 22 '10
146 How to prove Euler's formula: $e^{i\varphi}=\cos(\varphi) +i\sin(\varphi)$? Aug 28 '10
130 Is there a general formula for solving 4th degree equations (quartic)? Jul 27 '10
82 Proof that the irrational numbers are uncountable Jul 26 '10
66 Proving that 1- and 2-d simple symmetric random walks return to the origin with probability 1 Jul 23 '10
65 Where is the flaw in this “proof” that 1=2? (Derivative of repeated addition) Jul 29 '10
64 Can there be two distinct, continuous functions that are equal at all rationals? Jul 22 '10
60 Is there a formula to calculate the sum of all proper divisors of a number? Feb 18 '11
60 What are some examples of a mathematical result being counterintuitive? May 2 '12
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