List questions from formal-completions

Published on 27 Jun 2021 - 14:40

116

Views

Is $\widehat{IM}=\widehat I \widehat M$ for any finitely generated module $M$, where $\widehat {(-)}$ denotes completion w.r.t. maximal ideal?

Published on 20 Jul 2021 - 22:45

310

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Completion (as a module) of the integral closure of a Cohen-Macaulay local ring whose completion is reduced

Published on 25 Mar 2026 - 11:06

141

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Basis of a completion of a vector space

Published on 03 Aug 2021 - 22:19

320

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Profinite completion of the $p$-adic integers $\mathbb Z_p$

Published on 09 Aug 2021 - 22:46

85

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Projective limits and completions

Published on 16 Aug 2021 - 16:59

34

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An explicit description of topology over completion of topological groups

Published on 02 Nov 2021 - 8:01

113

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Application of Hensel's lemma to $\mathbb{Z}_3[[j]]$

Published on 25 Mar 2026 - 11:16

89

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Is $ \widehat L(α)$ is $ \widehat {L(α)}$ ? (^ means completion)

Published on 06 Jun 2022 - 5:47

130

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A Question on Flatness of Complete Local Rings

Published on 10 Jun 2022 - 6:29

131

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Completion of the stalk of a flat scheme over a complete local Noetherian ring

Published on 24 Jun 2022 - 19:30

132

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What is completion of $ \Bbb{Q}( \sqrt{-1})$ at prime ideal $(3)$?

Published on 03 Aug 2022 - 19:50

50

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p-adic completion of ring only only depends on the mod $p$ reduction

Published on 28 Aug 2022 - 10:42

52

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Formal completion of a scalar extension

Published on 29 Aug 2022 - 13:06

26

Views

Is there a plane in which every three points have an orthocenter?

Published on 10 Sep 2022 - 23:52

List Question

on the topology of the topological completion

Is $\widehat{IM}=\widehat I \widehat M$ for any finitely generated module $M$, where $\widehat {(-)}$ denotes completion w.r.t. maximal ideal?

Completion (as a module) of the integral closure of a Cohen-Macaulay local ring whose completion is reduced

Basis of a completion of a vector space

Profinite completion of the $p$-adic integers $\mathbb Z_p$

Projective limits and completions

An explicit description of topology over completion of topological groups

Application of Hensel's lemma to $\mathbb{Z}_3[[j]]$

Is $ \widehat L(α)$ is $ \widehat {L(α)}$ ? (^ means completion)

A Question on Flatness of Complete Local Rings

Completion of the stalk of a flat scheme over a complete local Noetherian ring

What is completion of $ \Bbb{Q}( \sqrt{-1})$ at prime ideal $(3)$?

p-adic completion of ring only only depends on the mod $p$ reduction

Formal completion of a scalar extension

Is there a plane in which every three points have an orthocenter?

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