Question

Finding a basis for the integer lattice points in a subspace

score 1.6k · Answer 1 · 2026-04-14 09:02:29

1.6k

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Finding a basis for the integer lattice points in a subspace

Published on 14 Apr 2026 - 9:02

score 1.9k · Answer 2 · 2026-03-26 03:06:10

1.9k

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Hartshorne II Ex 5.9(a) or R. Vakil Ex 15.4.D(b): Saturated modules

Published on 26 Mar 2026 - 3:06

score 588 · Answer 3 · 2026-04-12 06:51:01

588

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Example of a compact module which is not finitely generated

Published on 12 Apr 2026 - 6:51

score 467 · Answer 4 · 2026-04-15 04:39:05

467

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For abelian groups: does knowing $\text{Hom}(X,Z)$ for all $Z$ suffice to determine $X$?

Published on 15 Apr 2026 - 4:39

score 1.1k · Answer 5 · 2026-04-15 17:39:46

1.1k

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$\hom (M, \coprod_i N_i) \cong \bigoplus_i \hom (M, N_i)$ in abelian categories when $M$ is simple?

Published on 15 Apr 2026 - 17:39

score 536 · Answer 6 · 2026-04-12 22:58:20

536

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Module over a polynomial ring

Published on 12 Apr 2026 - 22:58

score 37 · Answer 7 · 2026-04-16 07:07:23

37

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Does the module $M=\langle x^2+y^2 \rangle$ have a basis over $K[x,y]$

Published on 16 Apr 2026 - 7:07

score 76 · Answer 8 · 2026-04-12 05:32:45

76

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R-Module Homomorphism from $I\otimes I$ to $\mathbb{Z}_2$, where $I = (2,x)$

Published on 12 Apr 2026 - 5:32

score 147 · Answer 9 · 2026-04-12 04:25:59

147

Views

Direct limit of a subdirected system

Published on 12 Apr 2026 - 4:25

score 109 · Answer 10 · 2026-04-14 14:45:05

109

Views

Is there a surjective homomorphism from $\oplus_{i=0}^\infty $ $\Bbb Z_p$ into $\prod_{i=0}^\infty$ $\Bbb Z_p$?

Published on 14 Apr 2026 - 14:45

score 101 · Answer 11 · 2026-04-14 23:57:34

101

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"Multiplying" by denominator of quotient module

Published on 14 Apr 2026 - 23:57

score 55 · Answer 12 · 2026-04-15 19:29:30

55

Views

Show that $R = R\cdot e \oplus Ann R(e)$

Published on 15 Apr 2026 - 19:29

score 526 · Answer 13 · 2026-04-12 05:39:32

526

Views

Trouble understanding Eisenbud Exercise 2.19a

Published on 12 Apr 2026 - 5:39

score 1.4k · Answer 14 · 2026-03-26 22:17:16

1.4k

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Characterization of projective and injective modules

Published on 26 Mar 2026 - 22:17

score 314 · Answer 15 · 2026-04-15 21:18:46

314

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Isomorphism of two $\operatorname{Hom}$ modules

Published on 15 Apr 2026 - 21:18

List Question

Finding a basis for the integer lattice points in a subspace

Hartshorne II Ex 5.9(a) or R. Vakil Ex 15.4.D(b): Saturated modules

Example of a compact module which is not finitely generated

For abelian groups: does knowing $\text{Hom}(X,Z)$ for all $Z$ suffice to determine $X$?

$\hom (M, \coprod_i N_i) \cong \bigoplus_i \hom (M, N_i)$ in abelian categories when $M$ is simple?

Module over a polynomial ring

Does the module $M=\langle x^2+y^2 \rangle$ have a basis over $K[x,y]$

R-Module Homomorphism from $I\otimes I$ to $\mathbb{Z}_2$, where $I = (2,x)$

Direct limit of a subdirected system

Is there a surjective homomorphism from $\oplus_{i=0}^\infty $ $\Bbb Z_p$ into $\prod_{i=0}^\infty$ $\Bbb Z_p$?

"Multiplying" by denominator of quotient module

Show that $R = R\cdot e \oplus Ann R(e)$

Trouble understanding Eisenbud Exercise 2.19a

Characterization of projective and injective modules

Isomorphism of two $\operatorname{Hom}$ modules

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