What does $(a_n)_n \in A^{\mathbb{N}}$ mean?
What kind of sequence is that? How does the indexing work?
What's the $A$ to natural numbers power?
2026-03-26 04:50:46.1774500646
What does $(a_n)_n \in A^{\mathbb{N}}$ mean?
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That power notation indicates the set of functions, $A^\mathbb{N} = \{f: \mathbb{N} \to A\}$, which in this case means the set of infinite sequences of elements of $A$.