Question

Is the bidual of a C*-algebra isomorphic to the universal enveloping von Nemann algebra as a Banach algebra?

score 154 · Answer 1 · 2026-05-06 01:44:45

154

Views

Is the bidual of a C*-algebra isomorphic to the universal enveloping von Nemann algebra as a Banach algebra?

Published on 06 May 2026 - 1:44

score 55 · Answer 2 · 2026-05-05 02:04:29

55

Views

$\ell(M/N) \leq \ell(M)$ if $M$ is an $A$-module

Published on 05 May 2026 - 2:04

score 82 · Answer 3 · 2026-04-29 12:54:43

82

Views

Ring, but not a field.

Published on 29 Apr 2026 - 12:54

score 75 · Answer 4 · 2026-05-07 14:22:53

75

Views

Are the $k[x]$-modules $M = k[x]/\langle x + 1 \rangle \oplus k[x]/\langle x + 1 \rangle $ and $N = k[x]/\langle (x + 1)^2 \rangle$ isomorphic?

Published on 07 May 2026 - 14:22

score 179 · Answer 5 · 2026-05-05 04:15:16

179

Views

Do we have $R\simeq S$ for two submodules $R,S$ of $A^n$?

Published on 05 May 2026 - 4:15

score 323 · Answer 6 · 2026-04-29 12:54:17

323

Views

Is $R$ finitely generated?

Published on 29 Apr 2026 - 12:54

score 1.5k · Answer 7 · 2026-05-05 06:19:14

1.5k

Views

FOL - If two models agree on every sentence are they isomorphic?

Published on 05 May 2026 - 6:19

score 276 · Answer 8 · 2026-05-07 16:53:07

276

Views

Showing that $\frac{\mathbb{R}[x]}{\langle x \rangle}$ and $\frac{\mathbb{R}[x]}{\langle x-1 \rangle}$ are not isomorphic as $\mathbb{R}[x]$ modules.

Published on 07 May 2026 - 16:53

score 424 · Answer 9 · 2026-05-07 11:04:47

424

Views

Are two submodules (where one is contained in the other) isomorphic if their quotientmodules are isomorphic?

Published on 07 May 2026 - 11:04

score 48 · Answer 10 · 2026-04-29 12:54:38

48

Views

A problem about checking isomorphism of R-module

Published on 29 Apr 2026 - 12:54

score 327 · Answer 11 · 2026-05-05 04:15:12

327

Views

Is the Evaluation map of an R-Module of rank 1 and hom injective

Published on 05 May 2026 - 4:15

score 166 · Answer 12 · 2026-04-29 12:54:06

166

Views

Isomorphism between tensor product of modules and quotient module

Published on 29 Apr 2026 - 12:54

score 562 · Answer 13 · 2026-04-29 12:53:41

562

Views

Direct Sum In modules

Published on 29 Apr 2026 - 12:53

score 108 · Answer 14 · 2026-04-29 12:54:04

108

Views

Direct Sum of Sub modules and proof Verification

Published on 29 Apr 2026 - 12:54

score 249 · Answer 15 · 2026-04-29 12:54:02

249

Views

Direct Sum Of Torsion modules and Proof Verification

Published on 29 Apr 2026 - 12:54

List Question

Is the bidual of a C*-algebra isomorphic to the universal enveloping von Nemann algebra as a Banach algebra?

$\ell(M/N) \leq \ell(M)$ if $M$ is an $A$-module

Ring, but not a field.

Are the $k[x]$-modules $M = k[x]/\langle x + 1 \rangle \oplus k[x]/\langle x + 1 \rangle $ and $N = k[x]/\langle (x + 1)^2 \rangle$ isomorphic?

Do we have $R\simeq S$ for two submodules $R,S$ of $A^n$?

Is $R$ finitely generated?

FOL - If two models agree on every sentence are they isomorphic?

Showing that $\frac{\mathbb{R}[x]}{\langle x \rangle}$ and $\frac{\mathbb{R}[x]}{\langle x-1 \rangle}$ are not isomorphic as $\mathbb{R}[x]$ modules.

Are two submodules (where one is contained in the other) isomorphic if their quotientmodules are isomorphic?

A problem about checking isomorphism of R-module

Is the Evaluation map of an R-Module of rank 1 and hom injective

Isomorphism between tensor product of modules and quotient module

Direct Sum In modules

Direct Sum of Sub modules and proof Verification

Direct Sum Of Torsion modules and Proof Verification

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