Complemented basic sequences in Frechet spaces with finite dimensional decomposition

Hasan Gül, Süleyman Onal

Let $E$ be a Frechet-Montel space and $(E_n{)}_{n\in \mathbb{N}}$ be a finite dimensional unconditional decomposition of $E$ with $\dim (E_n)\le k$ for some fixed $k\in \mathbb{N}$…