List questions from ring-theory

Published on 10 Jun 2018 - 14:53

59

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Direct sum of $R$ - Modules

Published on 10 Jun 2018 - 17:46

275

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f is surjective ring homomorphism form (A,+, .) to (B, +, .)

Published on 25 Mar 2026 - 3:06

203

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Is $\mathbb Q$ a quotient of $\mathbb R[X]$?

Published on 25 Mar 2026 - 10:55

78

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Automorphism of power series

Published on 11 Jun 2018 - 14:17

433

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Find out if polynomial has inverse in quotient ring

Published on 25 Mar 2026 - 16:12

650

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Can it be that $R[[x]]$ is flat over $R$ but not over $R[x]$?

Published on 22 Mar 2026 - 23:52

44

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Let R be a prime Jacobson ring (with 1)

Published on 25 Mar 2026 - 9:50

48

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General result for rings in which irreducible is prime?

Published on 12 Jun 2018 - 10:15

24

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One-sided zero-divisors which are identity from the other side

Published on 12 Jun 2018 - 10:18

95

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$1+yx$ is left-invertible if and only if $1+yx$ is invertible

Published on 12 Jun 2018 - 10:31

196

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Local ring of a surface: polynomial expression

Published on 25 Mar 2026 - 1:21

32

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Let $A$ be a ring. Let $x$ nilpotent and $u$ $\in$ unit of $A$ then $(x + u)$ $\in$ unity of $A$.

Published on 12 Jun 2018 - 15:52

176

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Are global complete intersections locally complete intersections?

Published on 12 Jun 2018 - 22:15

87

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Prove that this subset of $\mathbb{Q}$ under multiplication is a PID

Published on 12 Jun 2018 - 23:58

List Question

What are the maximal ideals containing the intersection of maximal ideals?

Direct sum of $R$ - Modules

f is surjective ring homomorphism form (A,+, .) to (B, +, .)

Is $\mathbb Q$ a quotient of $\mathbb R[X]$?

Automorphism of power series

Find out if polynomial has inverse in quotient ring

Can it be that $R[[x]]$ is flat over $R$ but not over $R[x]$?

Let R be a prime Jacobson ring (with 1)

General result for rings in which irreducible is prime?

One-sided zero-divisors which are identity from the other side

$1+yx$ is left-invertible if and only if $1+yx$ is invertible

Local ring of a surface: polynomial expression

Let $A$ be a ring. Let $x$ nilpotent and $u$ $\in$ unit of $A$ then $(x + u)$ $\in$ unity of $A$.

Are global complete intersections locally complete intersections?

Prove that this subset of $\mathbb{Q}$ under multiplication is a PID

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