Question

Fixed ring $\mathbb{Z}[\zeta]^\tau$ is the ring of integers of the fixed field $\mathbb{Q}(\zeta)^\tau$

score 131 · Answer 1 · 2026-03-25 06:08:00

131

Views

Fixed ring $\mathbb{Z}[\zeta]^\tau$ is the ring of integers of the fixed field $\mathbb{Q}(\zeta)^\tau$

Published on 25 Mar 2026 - 6:08

score 369 · Answer 2 · 2026-03-22 16:09:26

369

Views

injective homomorphism of local rings and completions

Published on 22 Mar 2026 - 16:09

score 45 · Answer 3 · 2018-05-31 03:36:12

45

Views

Proof Verification: Rational root of a Polynomial in $\mathbb{Z} [x]$

Published on 31 May 2018 - 3:36

score 117 · Answer 4 · 2026-03-27 00:39:08

117

Views

$\text{Hom}_{k}(U \oplus V,W) \cong \text{Hom}_{k}(U,W) \oplus \text{Hom}_{k}(V,W)$

Published on 27 Mar 2026 - 0:39

score 100 · Answer 5 · 2018-05-31 15:04:41

100

Views

Example of set of zero divisors whose linear combinations are again zero divisors

Published on 31 May 2018 - 15:04

score 44 · Answer 6 · 2026-03-27 22:04:47

44

Views

Is there a name for a ring with no additive inverses (like the non-negative real numbers)?

Published on 27 Mar 2026 - 22:04

score 1.7k · Answer 7 · 2026-03-28 19:37:49

1.7k

Views

About ideals in a ring which is a $k$ vector space

Published on 28 Mar 2026 - 19:37

score 79 · Answer 8 · 2026-03-27 15:19:13

79

Views

Module $M$ such that $Supp (M^n/N)=V(Ann (M^n /N))$ for every positive integer $n$ and every submodule $N$ of $M^n$

Published on 27 Mar 2026 - 15:19

score 87 · Answer 9 · 2018-06-01 17:48:30

87

Views

If $0$ is in the multiplicative set then the fraction ring contains only one element

Published on 01 Jun 2018 - 17:48

score 270 · Answer 10 · 2026-03-27 06:28:29

270

Views

Homomorphic image of matrix ring

Published on 27 Mar 2026 - 6:28

score 107 · Answer 11 · 2026-03-22 14:43:56

107

Views

Factoring an integer over quadratic ring

Published on 22 Mar 2026 - 14:43

score 423 · Answer 12 · 2026-03-22 00:05:13

423

Views

Recognizing Principal Ideals

Published on 22 Mar 2026 - 0:05

score 851 · Answer 13 · 2026-03-28 15:20:16

851

Views

Ideal in a Noetherian ring which is not equal to a product of prime ideals

Published on 28 Mar 2026 - 15:20

score 140 · Answer 14 · 2026-03-26 21:08:52

140

Views

Searching for examples of "graph algebras"

Published on 26 Mar 2026 - 21:08

score 144 · Answer 15 · 2018-06-02 11:16:49

144

Views

Is $a+b$ a unit if $a,b,a-b$ are zero divisors?

Published on 02 Jun 2018 - 11:16

List Question

Fixed ring $\mathbb{Z}[\zeta]^\tau$ is the ring of integers of the fixed field $\mathbb{Q}(\zeta)^\tau$

injective homomorphism of local rings and completions

Proof Verification: Rational root of a Polynomial in $\mathbb{Z} [x]$

$\text{Hom}_{k}(U \oplus V,W) \cong \text{Hom}_{k}(U,W) \oplus \text{Hom}_{k}(V,W)$

Example of set of zero divisors whose linear combinations are again zero divisors

Is there a name for a ring with no additive inverses (like the non-negative real numbers)?

About ideals in a ring which is a $k$ vector space

Module $M$ such that $Supp (M^n/N)=V(Ann (M^n /N))$ for every positive integer $n$ and every submodule $N$ of $M^n$

If $0$ is in the multiplicative set then the fraction ring contains only one element

Homomorphic image of matrix ring

Factoring an integer over quadratic ring

Recognizing Principal Ideals

Ideal in a Noetherian ring which is not equal to a product of prime ideals

Searching for examples of "graph algebras"

Is $a+b$ a unit if $a,b,a-b$ are zero divisors?

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