Voldemort
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1,754
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### Questions (74)

 18 A matrix is diagonalizable, so what? 17 How do I prove that $\cos{\frac{2\pi}{7}}\notin\mathbb{Q}$? 16 Is the set of real numbers the largest possible totally ordered set? 13 Can $2^n$ and $2^{n+1}$ have the same digit sum? 10 How do I find the minimum size of a generating set of a group?

### Reputation (1,754)

 +5 How to do this approximation? +5 The measure of the diagonal of a unit square in an alternative measure. -2 How is it that the derivative operator is a closed linear operator? +5 Are two matrices having the same characteristic and minimal polynomial always similar?

 9 What is the largest determinant you can get by filling in 0,1 or 2 into a 4-by-4 matrix? 2 You only need countable many sets each time in a generated $\sigma$-algebra, right? 2 How do I prove that in every commuting family there is a common eigenvector?

### Tags (41)

 11 matrices × 16 0 calculus × 6 2 real-analysis × 5 0 general-topology × 6 2 measure-theory × 2 0 functional-analysis × 5 0 linear-algebra × 10 0 logic × 3 0 probability × 10 0 notation × 3

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