Let $H$ be an Hibert space over $\mathbb{C}$
Let $\{h_n\}_{n \in \mathbb{N}} \subset H$ a sequence of linearly independent vectors in $H$ such that $h_n \to h$ in norm topology.
We apply Gram–Schmidt process to the succession starting from $h_1$ then $h_2$ and so on obtaining the succession $\{u_n\}_{n \in \mathbb{N}}$
Let $W_n = \overline{\operatorname{span}}\{u_j\}_{j\ge n}$
My question is if $h_n \in W_{n+1}$
Thanks.
No. $h_n \in \operatorname{span}\{u_j\}_{j\le n}$, which is orthogonal to $W_{n+1}$.