Algebear's user avatar
Algebear's user avatar
Algebear's user avatar
Algebear
  • Member for 7 years, 4 months
  • Last seen more than a week ago
  • Amsterdam, Nederland
5 votes
Accepted

Solve a trigonometric equation: $|1-2\sin^2 x|=|\cos x|$

4 votes

Galois group of $(x^3-2)(x^5-1)$ over $\mathbb{Q}$.

3 votes
Accepted

Symmetric continued fractions property where $q^2\equiv(-1)^n$ mod $p$

2 votes

What's the process in rectangular form for deriving $(a+bi)^{a+bi}$?

2 votes
Accepted

Show that if $ \ n >pq-(p+q) \ $ then $ \ px+qy=n \ $ has at least one solution in positive integers

2 votes
Accepted

Can I use variable substitution on $\delta$-$\epsilon$ proofs?

1 vote

Reciprocal of entire function

1 vote

Compute the limit $\lim_{x\to 0}\left(\frac{(1+x)^\frac{1}{x}}{e}\right)^\frac{1}{x}$

1 vote
Accepted

Every cubic extension $L/K$ is of the shape $L=K(\sqrt[3]{\alpha})$ with $\alpha$ not a cubed number and $\text{char}(K)\neq3$

1 vote

Thinking mathematically and proving things

1 vote

Symmetry and Tic Tac Toe

1 vote

Question about Galois Theory. Extension of a field of odd characteristic.

1 vote

$N \in \mathbb{N}$ is not a square, show that the continued fraction expansion of $\sqrt N/\lfloor\sqrt N\rfloor$ is $[1,\overline{a_1,a_2,\dots,2}]$

1 vote

Define the set $E(\mathbb{Q})$ of $\mathbb{Q}$-rational points on an elliptic curve

1 vote

Expand of $(x+y+z+...)^{n}$

0 votes

Number of solutions for x^2=a(mod m)

0 votes

Galois group of $x^n-x+1$

0 votes

What is the minimum number of questions to find the ring

0 votes

Difference between function and equation

0 votes
Accepted

Complex function, branch-cut

0 votes

How to find examples of non-unique euclidean division in $\Bbb Z[i]$?

0 votes

What are some good methods for finding value of $\arctan (x- \sqrt{y}).$

0 votes

Convergence proof: If sum to infinity of a function is convergent, does that mean for another smaller function, it will also be convergent?

0 votes

Laurent Series of $\frac{1}{(1+z^2)^2}$

-1 votes
Accepted

Diffeomorphism with only hyperbolic periodic points has finitely many periodic points (Morse-Smale)