Question

Presentation of (presumably) inner direct product $G_1\times G_2$

score 57 · Answer 1 · 2017-07-02 17:06:48

57

Views

Presentation of (presumably) inner direct product $G_1\times G_2$

Published on 02 Jul 2017 - 17:06

score 107 · Answer 2 · 2017-07-02 17:47:26

107

Views

Showing $A\times B\cong B\times A$

Published on 02 Jul 2017 - 17:47

score 74 · Answer 3 · 2017-07-04 13:13:34

74

Views

How to completely classify all cyclicity-forcing numbers without introducing the notion of a 'semi-direct product'?

Published on 04 Jul 2017 - 13:13

score 303 · Answer 4 · 2017-07-09 06:22:41

303

Views

On left and right group actions

Published on 09 Jul 2017 - 6:22

score 521 · Answer 5 · 2017-07-12 11:59:58

521

Views

Direct product of $D2$ and $D3$

Published on 12 Jul 2017 - 11:59

score 305 · Answer 6 · 2017-07-13 04:16:58

305

Views

Well-definition of direct product of an arbitrary collection of groups?

Published on 13 Jul 2017 - 4:16

score 102 · Answer 7 · 2017-07-17 13:38:00

102

Views

Direct products - Is this an abuse of notation?

Published on 17 Jul 2017 - 13:38

score 734 · Answer 8 · 2026-03-26 17:36:52

734

Views

On ring isomorphism between cartesian products of rings

Published on 26 Mar 2026 - 17:36

score 219 · Answer 9 · 2017-07-21 06:35:09

219

Views

Is the definition of the canonical projection given wrong ? If so, is there any problem in my correction?

Published on 21 Jul 2017 - 6:35

score 870 · Answer 10 · 2017-07-23 06:44:04

870

Views

Example of a group $G$ such that $G = N_1\cdots N_n$ and $N_i \cap N_j = \{e\}$ for all $i \neq j$ but $G$ is not the internal direct product of them.

Published on 23 Jul 2017 - 6:44

score 74 · Answer 11 · 2017-07-25 15:24:40

74

Views

For $x\in E$ and $x = x_1 + x_2$, where $x_1 \in E_1$, shouldn't the distance vector of x from the subspace $E_1$ be unique?

Published on 25 Jul 2017 - 15:24

score 404 · Answer 12 · 2026-03-27 00:06:38

404

Views

Injective ring homomorphism between finite direct product of rings

Published on 27 Mar 2026 - 0:06

score 1.3k · Answer 13 · 2026-03-26 22:14:59

1.3k

Views

Group Presentation of the Direct Product.

Published on 26 Mar 2026 - 22:14

score 173 · Answer 14 · 2017-08-12 20:49:51

173

Views

Do not understand the duality given by the non-degenerate bilinear form

Published on 12 Aug 2017 - 20:49

score 427 · Answer 15 · 2017-08-26 07:37:01

427

Views

When are the tensor product and the cartesian product of rings isomorphic?

Published on 26 Aug 2017 - 7:37

List Question

Presentation of (presumably) inner direct product $G_1\times G_2$

Showing $A\times B\cong B\times A$

How to completely classify all cyclicity-forcing numbers without introducing the notion of a 'semi-direct product'?

On left and right group actions

Direct product of $D2$ and $D3$

Well-definition of direct product of an arbitrary collection of groups?

Direct products - Is this an abuse of notation?

On ring isomorphism between cartesian products of rings

Is the definition of the canonical projection given wrong ? If so, is there any problem in my correction?

Example of a group $G$ such that $G = N_1\cdots N_n$ and $N_i \cap N_j = \{e\}$ for all $i \neq j$ but $G$ is not the internal direct product of them.

For $x\in E$ and $x = x_1 + x_2$, where $x_1 \in E_1$, shouldn't the distance vector of x from the subspace $E_1$ be unique?

Injective ring homomorphism between finite direct product of rings

Group Presentation of the Direct Product.

Do not understand the duality given by the non-degenerate bilinear form

When are the tensor product and the cartesian product of rings isomorphic?

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