Question

Principal ideal over a ring

score 86 · Answer 1 · 2026-04-11 00:29:18

86

Views

Principal ideal over a ring

Published on 11 Apr 2026 - 0:29

score 835 · Answer 2 · 2026-04-12 01:01:41

835

Views

killing form is positive definite on cartan subalgebra

Published on 12 Apr 2026 - 1:01

score 858 · Answer 3 · 2026-03-25 06:19:13

858

Views

A sequence is exact iff the corresponding sequence is exact

Published on 25 Mar 2026 - 6:19

score 543 · Answer 4 · 2026-03-25 04:39:23

543

Views

Is my proof that finite fields have order $p^n$ valid?

Published on 25 Mar 2026 - 4:39

score 1k · Answer 5 · 2026-04-09 02:00:03

1k

Views

Center of Simple Abelian Group and Simple Nonabelian Group

Published on 09 Apr 2026 - 2:00

score 72 · Answer 6 · 2026-03-24 23:44:40

72

Views

Integral Elements of $\mathbb{Q[x]}$ in $\mathbb{Q(x)}$

Published on 24 Mar 2026 - 23:44

score 70 · Answer 7 · 2026-03-26 11:01:12

70

Views

. There exists a nondiagonal matrix $A\in \mathcal {M}_n (\mathbb{R}) $ s.t. $A^{k+1}=I_n $ and $I_n-A $ invertible?

Published on 26 Mar 2026 - 11:01

score 2.4k · Answer 8 · 2018-01-22 11:03:26

2.4k

Views

the number of maximal ideal in $Zp^4$

Published on 22 Jan 2018 - 11:03

score 97 · Answer 9 · 2018-01-22 12:11:55

97

Views

Subgroup of $Z_{108}$ of order 9

Published on 22 Jan 2018 - 12:11

score 203 · Answer 10 · 2026-04-09 03:40:01

203

Views

What's the image of the function $f(x)=(3x+2^{v_2(x)})$ on the Prufer 2-group?

Published on 09 Apr 2026 - 3:40

score 150 · Answer 11 · 2026-03-25 03:03:43

150

Views

Let $K = \mathbb{Q}\left(\frac{-1+\sqrt{-3}}{2}\right)$. Show that $\mathcal{O}_K = \mathbb{Z}\left[\frac{-1+\sqrt{-3}}{2}\right]$.

Published on 25 Mar 2026 - 3:03

score 33 · Answer 12 · 2026-03-26 11:05:05

33

Views

There is a nondiagonal matrix $A\in M_3(\mathbb{R})$ s.t. $ I_{3} +A+A^2=O_3$?

Published on 26 Mar 2026 - 11:05

score 59 · Answer 13 · 2026-04-09 03:40:31

59

Views

Characterize ideals in $\mathbb{F}_l[x]/(x-1) \oplus \mathbb{F}_l[x]/(\frac{x^p-1}{x-1})$

Published on 09 Apr 2026 - 3:40

score 94 · Answer 14 · 2026-04-11 15:57:56

94

Views

Two questions regarding quotients and fraction fields of polynomial rings

Published on 11 Apr 2026 - 15:57

score 148 · Answer 15 · 2026-04-08 22:42:25

148

Views

injective hull of a ring that is not integral domain

Published on 08 Apr 2026 - 22:42

List Question

Principal ideal over a ring

killing form is positive definite on cartan subalgebra

A sequence is exact iff the corresponding sequence is exact

Is my proof that finite fields have order $p^n$ valid?

Center of Simple Abelian Group and Simple Nonabelian Group

Integral Elements of $\mathbb{Q[x]}$ in $\mathbb{Q(x)}$

. There exists a nondiagonal matrix $A\in \mathcal {M}_n (\mathbb{R}) $ s.t. $A^{k+1}=I_n $ and $I_n-A $ invertible?

the number of maximal ideal in $Zp^4$

Subgroup of $Z_{108}$ of order 9

What's the image of the function $f(x)=(3x+2^{v_2(x)})$ on the Prufer 2-group?

Let $K = \mathbb{Q}\left(\frac{-1+\sqrt{-3}}{2}\right)$. Show that $\mathcal{O}_K = \mathbb{Z}\left[\frac{-1+\sqrt{-3}}{2}\right]$.

There is a nondiagonal matrix $A\in M_3(\mathbb{R})$ s.t. $ I_{3} +A+A^2=O_3$?

Characterize ideals in $\mathbb{F}_l[x]/(x-1) \oplus \mathbb{F}_l[x]/(\frac{x^p-1}{x-1})$

Two questions regarding quotients and fraction fields of polynomial rings

injective hull of a ring that is not integral domain

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