Sequence union

Set

context $X$
context $A\in \mathrm{InfSequence}(X)$
context $n\in \mathbb N$
definiendum ${\bigcup_{k=n+1}^\infty}A_k\equiv\bigcup A(\mathbb N\smallsetminus\mathrm{range}(n))$

Discussion

Parents

Context

Infinite sequence, Restricted image, Arbitrary union