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Future's user avatar
Future
  • Member for 8 years, 6 months
  • Last seen more than 6 years ago
9 votes

Topology textbook with a solution manual

8 votes

How do I solve the following equation: $z^4+z^3+z+1=0$

7 votes

Does $\sum\limits_{n=1}^\infty \frac{1}{n^p}, 1 < p < 2$ converge?

7 votes

The real numbers are a field extension of the rationals?

7 votes
Accepted

Irreducible polynomial of degree $3$ and degree of extension

6 votes

What does vector mean in Linear Algebra?

6 votes
Accepted

If $Y$ is an irreducible subset of $X$, then its closure $\overline{Y}$ in $X$ is also irreducible.

6 votes
Accepted

The number of elements in the special linear group over the finite field $\mathbb{Z}/p$

5 votes
Accepted

Proving that $\{(x,y):x^2-2x+y^2=0\}\cup \{(x,0):x\in [2,3]\}$ is connected

5 votes
Accepted

Find all prime ideals and maximal ideals of $\mathbb{Z}/12\mathbb{Z}$

5 votes
Accepted

How do I calculate $1.496\,\text{E}11$?

5 votes
Accepted

finding $\lim_{x \to \infty}x^2\ln x$

5 votes

Show that $|f(x)-f(y)| < M|x-y| + \epsilon$ for all $x, y \in X$

5 votes
Accepted

Functor of section over U is left-exact

5 votes
Accepted

$K(ab,a+b) \subset K(a,b)\;$ finite field extension

5 votes
Accepted

How to write "There is at least 3" in logic

4 votes
Accepted

Closed subschemes of affine scheme

4 votes
Accepted

Range of continuous function related

4 votes

Does a zero eigenvalue mean that the matrix is not invertible regardless of its diagonalizability?

4 votes

Description of ideals of ring $F[x]/(x^n)$?

4 votes

A bijection between $X \times (Y \times Z)$ and $ (X \times Y) \times Z$

4 votes
Accepted

Proving that a module homomorphism is an isomorphism if and only if the induced map between the localizations is an isomorphism

4 votes
Accepted

Basis for Vector Space iff can be Expressed Uniquely as Linear Combo of Basis

3 votes

What is this set $\mathbb{R}$ mod $2\pi$

3 votes

$G = \left\{1, -1\right\}$ is a group under multiplication

3 votes
Accepted

Understanding of an example of "extending scalars"

3 votes
Accepted

If $A \subseteq B$, then $A_{\mathfrak p} \subseteq B_{\mathfrak q}$?

3 votes

Can $60+60\times0+1$ be both $1$ and $61$

3 votes

Degree of the splitting field of $ x^3-5 $ over $\mathbb{Q}$

3 votes
Accepted

If $R/J(R)$ is simple then $R$ is local

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