# Intersection-closed subgroup series property

From Groupprops

Template:Subgroup series metaproperty

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## Definition

### Symbol-free definition

A subgroup series property is said to be intersection-closed if the intersection of any two subgroup series, both having the property, also has the property. Here, by intersection of subgroup series, we mean the member-wise intersection.

### Definition with symbols

A subgroup series property is said to be intersection-closed if whenever and are two subgroup series, each having property so does .

## Related notions

A related notion to this is series-intersection-closed subgroup property, viz a subgroup property wherein the property of being a subgroup series wherein each member satisfies the property in its successor, is an intersection-closed subgroup series property.