Function restriction formalism chart: Difference between revisions
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* [[Endo-invariance property|Endo-invariance]] implies [[join-closed subgroup property|join-closed]]. {{proofat|[[Endo-invariance implies join-closed]]}} | * [[Endo-invariance property|Endo-invariance]] implies [[join-closed subgroup property|join-closed]]. {{proofat|[[Endo-invariance implies join-closed]]}} | ||
* [[Balanced subgroup property|Balanced]] implies [[transitive subgroup property|transitive]]. Conversely, any function-restriction-expressible subgroup property that is transitive, must be balanced. {{proofat|[[Balanced implies transitive]]}} | * [[Balanced subgroup property|Balanced]] implies [[transitive subgroup property|transitive]]. Conversely, any function-restriction-expressible subgroup property that is transitive, must be balanced. {{proofat|[[Balanced implies transitive]]}} | ||
* [[Invariance property|Invariance]] implies [[intersection-closed subgroup property|intersection-closed]]. {{proofat|[[Invariance implies intersection-closed]]}} | * [[Invariance property|Invariance]] implies [[strongly intersection-closed subgroup property|strongly intersection-closed]]. {{proofat|[[Invariance implies intersection-closed]]}} | ||
* [[Left-inner subgroup property|Left-inner]] implies [[left-extensibility-stable subgroup property|left-extensibility-stable]], that in turn implies [[intermediate subgroup condition]]. {{proofat|[[Left-extensibility-stable implies intermediate subgroup condition]]}} | * [[Left-inner subgroup property|Left-inner]] implies [[left-extensibility-stable subgroup property|left-extensibility-stable]], that in turn implies [[intermediate subgroup condition]]. {{proofat|[[Left-extensibility-stable implies intermediate subgroup condition]]}} | ||
* Quotient-hereditary invariance implies [[quotient-transitive subgroup property|quotient-transitive]] | * Quotient-hereditary invariance implies [[quotient-transitive subgroup property|quotient-transitive]] | ||
Latest revision as of 03:47, 20 August 2021
| Subgroup property | Function restriction expression | Endo-invariance | Balanced | Invariance | Left-inner | Quotient-hereditary invariance |
|---|---|---|---|---|---|---|
| Normal subgroup | Inner Aut, Inner Function | Yes | No | Yes | Yes | Yes |
| Characteristic subgroup | Aut Aut, Aut Function | Yes | Yes | Yes | No | No |
| Strictly characteristic subgroup | Surj. End Function, Surj. End. End. | Yes | No | Yes | No | Yes |
| Fully invariant subgroup | End. End. | Yes | Yes | Yes | No | Yes |
| Injective endomorphism-invariant subgroup | Inj. End. End., Inj. end. Inj. End. | Yes | Yes | Yes | No | No |
| Central factor | Inner Inner | No | Yes | No | Yes | No |
| Transitively normal subgroup | Normal Normal, Inner Normal | No | Yes | No | Yes | No |
| Conjugacy-closed normal subgroup | Class Class, Inner Class | No | Yes | No | Yes | ? |
| Retraction-invariant subgroup | Retraction Retraction, Retraction Function | Yes | Yes | Yes | No | Yes |
| Powering-invariant subgroup | Rational power map Rational power map, Rational power map Function | No | Yes | Yes | No | ? |
| Local powering-invariant subgroup | Local powering Local powering, Local powering Function | No | Yes | Yes | No | ? |
Note:
- Endo-invariance implies join-closed. For full proof, refer: Endo-invariance implies join-closed
- Balanced implies transitive. Conversely, any function-restriction-expressible subgroup property that is transitive, must be balanced. For full proof, refer: Balanced implies transitive
- Invariance implies strongly intersection-closed. For full proof, refer: Invariance implies intersection-closed
- Left-inner implies left-extensibility-stable, that in turn implies intermediate subgroup condition. For full proof, refer: Left-extensibility-stable implies intermediate subgroup condition
- Quotient-hereditary invariance implies quotient-transitive