Don
  • Member for 8 years, 8 months
  • Last seen more than 6 years ago
3 answers
13 votes
2k views
7 bookmarks
Real polynomial in two variables
3 answers
13 votes
327 views
6 bookmarks
Find the limit of $(\sin \frac{1}{n} \cdot \sin \frac{2}{n} \cdot ... \cdot \sin 1)^{\frac{1}{n}}$
4 answers
11 votes
435 views
5 bookmarks
How to compute $\int_0^{\infty} \frac{\sqrt{x}}{x^2-1}\mathrm dx$
1 answers
8 votes
2k views
7 bookmarks
Conjugacy classes in $SU_2$
2 answers
6 votes
2k views
7 bookmarks
Finite group is generated by a set of representatives of conjugacy classes.
1 answers
5 votes
623 views
3 bookmarks
Bijection $f: \mathbb{R}^2 \rightarrow \mathbb{R}^2$ preserves collinearity $\iff \ \ f(x)=Ax+b$
2 answers
5 votes
2k views
Counterexample, union of intersections, intersection of unions
2 answers
5 votes
4k views
1 bookmarks
Inverse of a mean, exponential distribution, expected value
1 answers
5 votes
498 views
1 bookmarks
Pointwise limits of continuous functions
5 answers
4 votes
397 views
1 bookmarks
How to compute this finite sum $\sum_{k=1}^n \frac{k}{2^k} + \frac{n}{2^n}$?
2 answers
4 votes
221 views
Jordan normal form theorem - a question about the proof I've found
2 answers
4 votes
128 views
Lipschitz functions in $\mathbb{R}^n, \ \ \mathbb{R}^m$, extension
1 answers
3 votes
41 views
Can this sequence be a martingale?
2 answers
3 votes
216 views
Baire one functions, characteristic functions of intervals
2 answers
3 votes
283 views
The smallest quadrangle inscribed in a rectangle
0 answers
3 votes
267 views
1 bookmarks
Isometry in Euclidean space, matrix
2 answers
3 votes
644 views
Sequence of real continuous functions pointwise convergent to $0$, evaluating integrals
1 answers
3 votes
134 views
2 bookmarks
Integral, limit, sequence of functions
0 answers
2 votes
532 views
1 bookmarks
k-th hitting time is a stopping time
1 answers
2 votes
42 views
Markov chain - is my diagram/matrix correct?
1 answers
2 votes
985 views
Shortest polygonal path inside a rectangle
1 answers
2 votes
960 views
2 bookmarks
Ring of continuous functions on $\mathbb{R}$, maximal ideal, quotient
2 answers
2 votes
1k views
Square root of a diagonal matrix $\lambda I$
0 answers
2 votes
18 views
Polynomials, integrals convergence
1 answers
1 votes
494 views
1 bookmarks
Stopping time $\max \{n: S_n \le t\}$
2 answers
1 votes
276 views
1 bookmarks
Sum and difference of three normally distributed variables
1 answers
1 votes
62 views
Operator on polynomials, antiderivative
0 answers
1 votes
35 views
1 bookmarks
Fixed point, mapping in $\ell^2$
2 answers
1 votes
52 views
Problem while calculating a limit with tangens
1 answers
1 votes
89 views
1 bookmarks
Distribution, equation