srijan

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I am not in this earth by chance. I am here for a purpose and that purpose is to grow into a mountain, not to shrink to a grain of sand. Henceforth will I apply all my efforts to become the highest mountain of all and I will strain my potential until it cries for mercy.

The moving power of mathematical invention is not reasoning but imagination.

Augustus De Morgan


62 Answers

newest activity votes
11
Is there a non-abelian group $G$ such that $\operatorname{Aut}(G)$ is abelian?
may 30 at 0:56
10
$\mathbb{Q}$ is not open, is not closed, but is the countable union of closed sets.
apr 18 at 19:03
7
If order of the element $a^5$ is 12 can we make any guess about the order of the element $a$ in a group $G$?
apr 30 at 18:45
7
Is it true that $\lvert \sin z \rvert \leq 1$ for all $z\in \mathbb{C}$?
may 12 '12 at 10:17
6
Largest order of an element in a group
may 5 at 17:09
6
$I-AB$ be invertible $\Leftrightarrow$ $I-BA$ is invertible
apr 18 at 21:13
6
Proving connectedness of the $n$-sphere
apr 17 at 12:45
5
Existence of a function satisfying given conditions
may 30 at 6:15
5
Searching for unbounded, non-negative function $f(x)$ with roots $x_{n}\rightarrow \infty$ as $n \rightarrow \infty$
may 21 at 7:15
5
How can a matrix be Hermitian, unitary, and diagonal all at once
may 5 at 9:43
5
Why does the taylor series of $\ln (1 + x)$ only approximate it for $-1<x \le 1$?
apr 18 at 15:16
5
If a topological space is a path-connected, it is also connected. The converse fails. Can this be remedied?
apr 16 at 10:52
4
which of the followings are positive definite:
may 21 at 12:57
4
Looking for an isomorphism
apr 26 at 2:45
4
A group of order 105 contains a subgroup of order 35.
apr 21 at 14:56
4
Every set of non-overlapping disks in the plane is at most countable?
apr 18 at 21:53
4
One interesting question from linear algebra
apr 18 at 20:38
4
Trace of the matrix power
apr 16 at 11:06
4
Showing $\sin(\bar{z})$ is not analytic at any point of $\mathbb{C}$
jun 4 '12 at 7:00
3
Jacobi Method and Frobenius Norm Question.
jun 14 at 4:16
3
How to prove $\lvert \lVert x \rVert - \lVert y \rVert \rvert \overset{\heartsuit}{\leq} \lVert x-y \rVert$?
may 30 at 6:50
3
Continuity in metric space
may 22 at 8:41
3
Can a function be uniformly continuous on an open interval?
may 21 at 6:29
3
How to find 3 x 3 matrix inverses
may 20 at 10:38
3
To show that function is constant
may 19 at 9:45
3
Basic real analysis proof.
may 11 at 0:56
3
Describe all ring homomorphisms of:
may 4 at 9:36
3
Determine all subgroups of $\mathbb{R}^*$ (nonzero reals under multiplication) of index $2$.
apr 18 at 16:19
3
All group homomorphism from $ \mathbb{Z} _m $ to $\mathbb{Z}_n $
apr 25 at 14:07
3
number of subgroups of order $4$ of $\mathbb Z_4\oplus\mathbb Z_2?$
apr 25 at 8:35
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