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  • Member for 8 years, 11 months
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63 votes
Accepted

Prove if $56x = 65y$ then $x + y$ is divisible by $11$

8 votes
Accepted

The gcd of $p+q$ and $p-q$ where $p4 and $q$ are distinct odd primes

7 votes

Importance of eigenvalues

6 votes
Accepted

Is $G$ always a semidirect product of $[G,G]$ and $G/[G,G]$?

5 votes

Prove that $12 \mid n^2 - 1$ if $\gcd(n,6)=1$

5 votes

Relation Between Girth and Diameter of $G$

5 votes

Non-trivial finite/infinite subgroups of infinite groups

4 votes
Accepted

Evaluating $\sum_{n=0}^\infty \frac{n}{3^n}$

4 votes

What is the importance of eigenvalues/eigenvectors?

4 votes

Subgroup of order $n-1$ of a group of order $n$

4 votes
Accepted

How to integrate $e^{\sin x}(x \cos x - \tan x \sec x)$

3 votes

Information about $T$ if $T^2=0$

3 votes

Coloring Graph Problem

3 votes

Possible distinct positive real $x,y,z \neq 1$ with $x^{(y^z)} = y^{(z^x)} = z^{(x^y)}$ in cyclic permutation?

3 votes

$H<K<G$ and $gHg^{-1}< K$ implies $g^{-1}Hg < K$

2 votes

$H<K<G$ and $gHg^{-1}< K$ implies $g^{-1}Hg < K$

2 votes

Show an increasing function with an interval as a range is continuous

2 votes

Suppose $AB=I$, where A has full rank. Is $BA=I$?

2 votes
Accepted

Prove that the elements $2x$ and $x^2$ have no LCM in the ring of integral polynomials with even coefficient of $x$

2 votes

Why do hyperbolic "trig" functions seem to be encountered rarely?

2 votes

Is there any nice characterization of the extension of $G/[G,G]$ by $[G,G]$ that equals $G$?

2 votes
Accepted

Trouble with Morley's theorem proof.

2 votes

Find general solutions of $y''−y=\frac{2}{1+e^x}$

2 votes

Finding vector perpendicular to R3 plane

1 vote

Quotient Groups of $\mathbb{R}$ x $\mathbb{R}$

1 vote

Is there any nice characterization of the extension of $G/[G,G]$ by $[G,G]$ that equals $G$?

1 vote
Accepted

Order of element in group given by order of conjugacy class

1 vote
Accepted

Is it possible to draw a graph that has an Euler Cycle but not a Hamilton Path?

1 vote

A question about generators, commutators, and center

1 vote

Prove that $n^2 + n +1$ is not divisible by $5$ for any $n$