A family (Bi)i∈J is a subfamily of a family (Ai)i∈I, if and only if J is a subset of I and for all i in J
- Bi = Ai
Read more about this topic: Indexed Family
A family (Bi)i∈J is a subfamily of a family (Ai)i∈I, if and only if J is a subset of I and for all i in J
Read more about this topic: Indexed Family