Function restriction formalism chart
| 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