Question

Does there exist a surjective ring homomorphism $\mathbb{Z}[\sqrt{-5}]$ to $\mathbb{Z}$?

score 483 · Answer 1 · 2026-04-10 23:58:29

483

Views

Does there exist a surjective ring homomorphism $\mathbb{Z}[\sqrt{-5}]$ to $\mathbb{Z}$?

Published on 10 Apr 2026 - 23:58

score 124 · Answer 2 · 2026-04-12 10:37:59

124

Views

Interpretation of $\mathbb{R}^n/\mathbb{R}\mathrm{1}$

Published on 12 Apr 2026 - 10:37

score 63 · Answer 3 · 2026-04-29 12:57:34

63

Views

Growth rates of matrices

Published on 29 Apr 2026 - 12:57

score 589 · Answer 4 · 2026-04-14 01:40:17

589

Views

Galois group of $X^6-2$ over $\mathbb{Q}$

Published on 14 Apr 2026 - 1:40

score 66 · Answer 5 · 2026-04-14 05:50:56

66

Views

Show that $T$ is normal in $GL_{2}(\Bbb{R})$.

Published on 14 Apr 2026 - 5:50

score 37 · Answer 6 · 2026-04-16 13:42:03

37

Views

Show that $f_{|\,f[G]}$ is an isomorphism where $f(g)=g^2$ (no elements of order 4)

Published on 16 Apr 2026 - 13:42

score 305 · Answer 7 · 2026-04-11 06:30:41

305

Views

Is the vector space $\mathbb R$ over $\mathbb Z/2\mathbb Z$ isomorphic to $\mathbb Z/2\mathbb Z$? How about $\mathbb R$ over $\mathbb Q$?

Published on 11 Apr 2026 - 6:30

score 1.2k · Answer 8 · 2026-04-11 19:28:13

1.2k

Views

Finding left cosets

Published on 11 Apr 2026 - 19:28

score 88 · Answer 9 · 2026-04-12 15:57:23

88

Views

What does it mean for a subgroup to be normal in another subgroup?

Published on 12 Apr 2026 - 15:57

score 750 · Answer 10 · 2026-04-17 01:00:31

750

Views

How to show that the normalizer is the largest subgroup of a group in which a set is normal?

Published on 17 Apr 2026 - 1:00

score 478 · Answer 11 · 2026-04-15 04:51:48

478

Views

trying to understand the relation between quotient rings and Field extensions

Published on 15 Apr 2026 - 4:51

score 449 · Answer 12 · 2026-04-10 14:22:30

449

Views

Norm and trace proof in Lang

Published on 10 Apr 2026 - 14:22

score 377 · Answer 13 · 2026-04-12 11:16:27

377

Views

Method to adjoin elements to a ring - is the symbol $x$ overloaded?

Published on 12 Apr 2026 - 11:16

score 67 · Answer 14 · 2026-04-15 01:37:57

67

Views

Is the following arithmetic on conjugation of a set correct?

Published on 15 Apr 2026 - 1:37

score 301 · Answer 15 · 2026-04-12 23:48:52

301

Views

Finding the Galois group of $x^3-2$ over $\mathbb{Q}$.

Published on 12 Apr 2026 - 23:48

List Question

Does there exist a surjective ring homomorphism $\mathbb{Z}[\sqrt{-5}]$ to $\mathbb{Z}$?

Interpretation of $\mathbb{R}^n/\mathbb{R}\mathrm{1}$

Growth rates of matrices

Galois group of $X^6-2$ over $\mathbb{Q}$

Show that $T$ is normal in $GL_{2}(\Bbb{R})$.

Show that $f_{|\,f[G]}$ is an isomorphism where $f(g)=g^2$ (no elements of order 4)

Is the vector space $\mathbb R$ over $\mathbb Z/2\mathbb Z$ isomorphic to $\mathbb Z/2\mathbb Z$? How about $\mathbb R$ over $\mathbb Q$?

Finding left cosets

What does it mean for a subgroup to be normal in another subgroup?

How to show that the normalizer is the largest subgroup of a group in which a set is normal?

trying to understand the relation between quotient rings and Field extensions

Norm and trace proof in Lang

Method to adjoin elements to a ring - is the symbol $x$ overloaded?

Is the following arithmetic on conjugation of a set correct?

Finding the Galois group of $x^3-2$ over $\mathbb{Q}$.

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