# Category:Definitions/Group Direct Products

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This category contains definitions related to Group Direct Products.

Related results can be found in Category:Group Direct Products.

Let $\struct {G, \circ_1}$ and $\struct {H, \circ_2}$ be groups.

Let $G \times H: \set {\tuple {g, h}: g \in G, h \in H}$ be their cartesian product.

The **(external) direct product** of $\struct {G, \circ_1}$ and $\struct {H, \circ_2}$ is the group $\struct {G \times H, \circ}$ where the operation $\circ$ is defined as:

- $\tuple {g_1, h_1} \circ \tuple {g_2, h_2} = \tuple {g_1 \circ_1 g_2, h_1 \circ_2 h_2}$

This is usually referred to as the **group direct product** of $G$ and $H$.

## Subcategories

This category has only the following subcategory.

### I

## Pages in category "Definitions/Group Direct Products"

The following 4 pages are in this category, out of 4 total.