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user1511417
  • Member for 9 years, 4 months
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11 votes
2 answers
13k views

Why is 1+1=0 in a finite field F={0,1}?

5 votes
6 answers
3k views

Why is $\mathbb Q $ (rational numbers) countable? [duplicate]

4 votes
1 answer
105 views

Prove that $ \lim_\limits{x \to \infty} x(\sqrt{x^2+1}-x) $ = $ \frac{1}{2}$?

4 votes
1 answer
139 views

All irreducible polynoms of degree 4 in $\mathbb{Z}_2$

4 votes
3 answers
110 views

How do you factorize a polynom in $\mathbb{Z}_2$?

3 votes
1 answer
3k views

⊕: What is the meaning of the $\oplus$-symbol?

3 votes
7 answers
761 views

Why is $x(\sqrt{x^2+1} - x )$ approaching $1/2$ when $x$ becomes infinite?

3 votes
3 answers
305 views

Why can you prove the continuity of $f(x) = \frac{x}{1+x²}$ with $\delta = \min \{ 2, \frac{\epsilon}{2} \} $?

2 votes
3 answers
35k views

What is cos²(x)?

2 votes
3 answers
4k views

Why is $ \overline{e^z} = e^\overline{z} $?

2 votes
2 answers
116 views

How do you solve the equation $ (z^2-1)^2 = 4 ? $

2 votes
3 answers
13k views

Combining all three rotation matrices

2 votes
3 answers
73 views

What is $ \mathbb{N}^2 / R $?

2 votes
1 answer
408 views

When is $gng^{-1} \not = n$?

2 votes
0 answers
681 views

Why is the Monte Carlo integration dimensionally independent?

2 votes
1 answer
43 views

Quotient group members $\mathbb{Z}_3[X]/N$ with $N=1+X^2$

2 votes
1 answer
54 views

Is $1+X^2$ irreducible in $\mathbb{Z}_3$?

1 vote
0 answers
46 views

Unitgroup of $\mathbb{Z}_3[X]/(N)$ with $N=1+X^2$

1 vote
2 answers
299 views

What is a natural operation?

1 vote
0 answers
37 views

Epic morphism prove (for small groups)

1 vote
1 answer
213 views

Prove-idea for writing an odd prime number as a difference of two square-numbers

1 vote
1 answer
33 views

Does an $x \in \mathbb Z$ with $xa\equiv_nb$ exist, if $gcd(a,n) $ divides $b$?

1 vote
2 answers
322 views

Quadratic Bézier curve points

1 vote
6 answers
586 views

Why is $\lim_{x\to 1} (x^2 - 1)/(x-1) = 2$?

1 vote
4 answers
316 views

Why is $ \lim_{x\to0}\frac{2-\sqrt{4-x}}{x} = \frac{1}{4} $?

0 votes
2 answers
130 views

Why can you not cancel-down the square within a square-root?

0 votes
1 answer
145 views

Proof for function space

0 votes
1 answer
34 views

Is $ R = \{ (A,B) \in \Omega² \quad| \quad A \land B \} \quad$ with $\Omega = \{ A\quad| $ A is a proposition $ \}$ reflexive?

0 votes
4 answers
1k views

Proof that $1$ divides $n$

0 votes
1 answer
105 views

Show that $(R^{\times}, \cdot)$ form a group