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mandella
  • Member for 5 years, 9 months
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9 votes
1 answer
263 views

groups of conics

5 votes
1 answer
125 views

the spectrum of a bounded linear operator on $X\times X$

4 votes
1 answer
96 views

$|x|=7$,$|y|=3$ then $|\langle x,y \rangle |=21$

4 votes
1 answer
137 views

number theoretical questions for division of numbers $1$ to $100$

4 votes
3 answers
396 views

infinitude of primes that are $11 \bmod 12$

3 votes
3 answers
146 views

Solve $e^x + e^y = 20$ for $y$

3 votes
0 answers
3k views

Find all automorphisms of $\mathbb{Z}_{10}$

3 votes
0 answers
22 views

is this a primitive action of $\operatorname{Sym}(3)$

3 votes
2 answers
165 views

SI model analysis

3 votes
1 answer
119 views

transitive G-sets of $S_3$

3 votes
2 answers
98 views

Show that for every $n$ there is a prime $p$ such that

2 votes
1 answer
56 views

Select $n$ items out of $N$ with replacement

2 votes
3 answers
101 views

Show that if $\beta \mid \alpha$ in $\mathbb Z[i]$ then $N(\beta) \mid N(\alpha)$

2 votes
0 answers
314 views

In $\mathbb{R}^{n \times n}$, $AB$ and $BA$ have the same eigenvalues and Frobenius norm.

2 votes
1 answer
51 views

Cayley graphs on $n$ vertices

2 votes
1 answer
225 views

How to arbitrage these bookmakers?

2 votes
2 answers
66 views

elements of order two in $D_{10}$

2 votes
3 answers
229 views

Show that the polynomial $F(x)=x^4-7$ is irreducible in $\mathbb{F}_5$

2 votes
2 answers
363 views

primitive element $\alpha$ in $\mathbb{F}_{25}$

2 votes
1 answer
61 views

homomorphism $\mathrm{GL}(1,4)$ to $\mathrm{GL}(2,2)$ which is injective

2 votes
1 answer
83 views

Stokes theorem to find integral of differential form

2 votes
2 answers
51 views

finding all numbers $a,b$ that divide $c$ but product of $a$ and $b$ does not divide $c$

2 votes
1 answer
579 views

Is it true that if a graph is bipartite iff it is class 1 (edge-coloring)?

2 votes
1 answer
2k views

Induction proof (combinatorics)

2 votes
3 answers
222 views

recurrence relation concrete way to solve it

2 votes
1 answer
395 views

continuous function of product topology with singleton

2 votes
3 answers
164 views

Open, closed, compact set in the Euclidean metric

2 votes
3 answers
496 views

Interpolating $f$ and approximating its derivative

2 votes
1 answer
953 views

improper integral trapezoid and simpson rule

2 votes
1 answer
272 views

Bernstein polynomial for functions

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