Question

Additive inverses in endomorphism ring

score 95 · Answer 1 · 2022-02-28 23:36:53

95

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Additive inverses in endomorphism ring

Published on 28 Feb 2022 - 23:36

score 36 · Answer 2 · 2026-03-26 19:19:40

36

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Homomorphisms between $\Bbb Z[S_3] \to \Bbb Z[\Bbb Z \backslash 2 \Bbb Z]$

Published on 26 Mar 2026 - 19:19

score 84 · Answer 3 · 2022-03-06 15:56:28

84

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Prove that if X is finite, then X* is a basis for the vector space V* over F.

Published on 06 Mar 2022 - 15:56

score 420 · Answer 4 · 2026-03-26 22:52:33

420

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Surjective ring homomorphism from $\mathbb{Z}[i] \to \mathbb{Z}_q$

Published on 26 Mar 2026 - 22:52

score 152 · Answer 5 · 2022-03-08 21:23:49

152

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find all ring isomorphism $\phi $of $\mathbb{C}$ onto itself such that for any $a\in \mathbb{R} $ we have $\phi (a)=a$

Published on 08 Mar 2022 - 21:23

score 411 · Answer 6 · 2022-03-10 11:22:39

411

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homomorphism from a ring R to the quotient ring R/I

Published on 10 Mar 2022 - 11:22

score 142 · Answer 7 · 2022-03-16 03:24:24

142

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Proving that every ring $R$ admits a unique homomorphism $\mathbb{Z} \to R$

Published on 16 Mar 2022 - 3:24

score 296 · Answer 8 · 2022-03-26 01:35:30

296

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Ring isomorphism between a quotient ring and its image under a homomorphism

Published on 26 Mar 2022 - 1:35

score 47 · Answer 9 · 2022-04-11 04:40:04

47

Views

Prove that if $\Bbb{Q} ≤ E$ and $\Bbb{Q} ≤ F$, then $φ(r) = r$ for all $r ∈\Bbb{Q}$

Published on 11 Apr 2022 - 4:40

score 41 · Answer 10 · 2026-02-23 10:02:51

41

Views

Does a contradiction occurs about a homomorphism on $C(\Omega)$?

Published on 23 Feb 2026 - 10:02

score 116 · Answer 11 · 2026-03-27 12:20:16

116

Views

The ring $\frac{\mathbb{Z}[x]}{\langle x^n \rangle}$ is isomorphic to?

Published on 27 Mar 2026 - 12:20

score 47 · Answer 12 · 2026-03-25 15:42:37

47

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For any ideal, why must a ring homomorphism be surjective for the ideal to be mapped to an ideal?

Published on 25 Mar 2026 - 15:42

score 56 · Answer 13 · 2022-05-28 10:43:19

56

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$f:R\to S$ is finite injective and $S$ is of dim $1$

Published on 28 May 2022 - 10:43

score 80 · Answer 14 · 2022-06-01 17:17:28

80

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How can I understand this construction of a surjective $R$-module homomorphism?

Published on 01 Jun 2022 - 17:17

score 18 · Answer 15 · 2022-06-02 19:31:19

18

Views

Prove $U^{-1}R \cong R[\{X_s\}_{s \in U}]/(sX_s - 1).$

Published on 02 Jun 2022 - 19:31

List Question

Additive inverses in endomorphism ring

Homomorphisms between $\Bbb Z[S_3] \to \Bbb Z[\Bbb Z \backslash 2 \Bbb Z]$

Prove that if X is finite, then X* is a basis for the vector space V* over F.

Surjective ring homomorphism from $\mathbb{Z}[i] \to \mathbb{Z}_q$

find all ring isomorphism $\phi $of $\mathbb{C}$ onto itself such that for any $a\in \mathbb{R} $ we have $\phi (a)=a$

homomorphism from a ring R to the quotient ring R/I

Proving that every ring $R$ admits a unique homomorphism $\mathbb{Z} \to R$

Ring isomorphism between a quotient ring and its image under a homomorphism

Prove that if $\Bbb{Q} ≤ E$ and $\Bbb{Q} ≤ F$, then $φ(r) = r$ for all $r ∈\Bbb{Q}$

Does a contradiction occurs about a homomorphism on $C(\Omega)$?

The ring $\frac{\mathbb{Z}[x]}{\langle x^n \rangle}$ is isomorphic to?

For any ideal, why must a ring homomorphism be surjective for the ideal to be mapped to an ideal?

$f:R\to S$ is finite injective and $S$ is of dim $1$

How can I understand this construction of a surjective $R$-module homomorphism?

Prove $U^{-1}R \cong R[\{X_s\}_{s \in U}]/(sX_s - 1).$

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