Question

Let (x,d) be a metric space.Then x is called___________if for each there are
n2,n2,...,XnϵX
with
X=βϵ(x1∪,.....∪β

Answer 1

@Michele_Laino

Answer 2

I think that the statement is incmplete, since you are saying:
"...if for each there are..."
I ask for each ?

Answer 3

incomplete*

Answer 4

please can you make a screenshot of your question?