Mathematics
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29 Answers

Newest Activity Votes
12
Why are we allowed to multiply a 1x1 matrix by any matrix?
Aug 5 '16 at 3:12
4
Is this subset of $\ell_1$ compact?
Aug 3 '16 at 2:44
3
If $X=A\cup B$ show that $X=\bar{A}\cup B^{\circ}$
Aug 8 '16 at 23:17
3
Why paths are defined on connected subsets of $\mathbb{R}$?
Aug 5 '16 at 20:39
2
Basic Topology: “A” an open set, then B= A \{p} is an open set
Aug 9 '16 at 20:03
2
Definition of Absolute Value of a Complex Number
Aug 9 '16 at 18:19
2
Finding original equation from rounded values
Aug 4 '16 at 3:49
1
Show that two matrices are similar
Feb 14 '17 at 19:45
1
If $A \times B$ is closed is A necessarily closed?
Oct 20 '16 at 20:44
1
Proving a linear functional is continuous
Sep 22 '16 at 17:17
1
Questioning the measurability of these functions: $d_n(x)$ in every function varies.
Aug 24 '16 at 20:53
1
Is $X=\{(0,0),(1,0)\}\cup \bigcup_{n \neq 1}\{(x, 1/n) \mid x\in \mathbb{R}\}$ connected? Find its conmected components.
Aug 12 '16 at 18:33
1
Product of a L^p convergent sequence and pointwise convergence sequece
Aug 10 '16 at 21:03
1
Prove the identity of $\cosh(\ln x)= \frac{x^2 + 1}{2x}$
Aug 9 '16 at 23:47
1
Is a multivariate monotone function quasiconvex?
Aug 8 '16 at 23:33
1
Continuous function with compact set
Aug 8 '16 at 19:09
1
Solution (for the wavenumber $k$) of $\sum_{n=1}^{N}e^{ikn}=\sqrt{N(k^2+a)}$?
Aug 5 '16 at 3:01
1
Error on proof of :$\mathbb{R}^{n}$ can't be covered by open disjoint balls assuming euclidean norm
Aug 3 '16 at 2:34
1
Finding complex eigenvalues and its corresponding eigenvectors
Aug 2 '16 at 19:51
1
guided proof that there are infinitely many primes on the arithmetic progression $4n + 3$
Aug 2 '16 at 2:09
1
Proof of convergence of integral sequence using the definition of the limit
Jul 28 '16 at 17:28
0
Isomorphism between Dual Spaces and Annihilators in a Direct Sum
Aug 29 '16 at 18:34
0
Integration by parts with complicated expression
Aug 29 '16 at 16:55
0
How to find the cartesian coordinates of a point from its relationship to other points?
Aug 9 '16 at 23:56
0
Finding a bound on the difference of the products of two sequences
Aug 9 '16 at 21:31
0
Find all functions satisfying $\frac{1}{f(a)}+ \frac{1}{f(b)} = \frac{1}{f(c)} $ whenever $\frac{1}{a}+ \frac{1}{b} = \frac{1}{c} $
Aug 9 '16 at 19:22
0
Can you provide us calculations for an upper bound of $\frac{15}{\pi^2}ne^{H_n}\log(H_n)-e^{H_{n^2}}\log(H_{n^2})$?
Aug 9 '16 at 17:55
0
Common fixed point for two functions
Aug 5 '16 at 3:38
0
Connected and locally path connected
Aug 1 '16 at 23:48