# Difference between revisions of "Homomorph-containing subgroup"

From Groupprops

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* [[Weaker than::Normal Sylow subgroup]] | * [[Weaker than::Normal Sylow subgroup]] | ||

* [[Weaker than::Normal Hall subgroup]] | * [[Weaker than::Normal Hall subgroup]] | ||

+ | * [[Weaker than::Fully invariant direct factor]] | ||

===Weaker properties=== | ===Weaker properties=== |

## Revision as of 18:39, 15 June 2009

BEWARE!This term is nonstandard and is being used locally within the wiki. [SHOW MORE]

This article defines a subgroup property: a property that can be evaluated to true/false given a group and a subgroup thereof, invariant under subgroup equivalence. View a complete list of subgroup properties[SHOW MORE]

## Definition

A subgroup of a group is termed **homomorph-containing** if for any , the image is contained in .

## Relation with other properties

### Stronger properties

- Order-containing subgroup
- Subhomomorph-containing subgroup
- Variety-containing subgroup
- Normal Sylow subgroup
- Normal Hall subgroup
- Fully invariant direct factor

### Weaker properties

- Fully characteristic subgroup: Also related:
- Isomorph-containing subgroup
- Homomorph-dominating subgroup

## Facts

- The omega subgroups of a group of prime power order are homomorph-containing.
`Further information: Omega subgroups are homomorph-containing`

## Metaproperties

### Trimness

This subgroup property is trim -- it is both trivially true (true for the trivial subgroup) and identity-true (true for a group as a subgroup of itself).

View other trim subgroup properties | View other trivially true subgroup properties | View other identity-true subgroup properties

### Intermediate subgroup condition

YES:This subgroup property satisfies the intermediate subgroup condition: if a subgroup has the property in the whole group, it has the property in every intermediate subgroup.ABOUT THIS PROPERTY: View variations of this property satisfying intermediate subgroup condition | View variations of this property not satisfying intermediate subgroup conditionABOUT INTERMEDIATE SUBROUP CONDITION:View all properties satisfying intermediate subgroup condition | View facts about intermediate subgroup condition

### Join-closedness

YES:This subgroup property is join-closed: an arbitrary (nonempty) join of subgroups with this property, also has this property.ABOUT THIS PROPERTY: View variations of this property that are join-closed | View variations of this property that are not join-closedABOUT JOIN-CLOSEDNESS: View all join-closed subgroup properties (or, strongly join-closed properties) | View all subgroup properties that are not join-closed | Read a survey article on proving join-closedness | Read a survey article on disproving join-closedness

### Quotient-transitivity

This subgroup property is quotient-transitive: the corresponding quotient property is transitive.

View a complete list of quotient-transitive subgroup properties