EN
Suppose ℒ₁ and ℒ₂ are subspace lattices on complex separable Banach spaces X and Y, respectively. We prove that under certain lattice-theoretic conditions every isomorphism from algℒ₁ to algℒ₂ is quasi-spatial; in particular, if a subspace lattice ℒ of a complex separable Banach space X contains a sequence $E_{i}$ such that $(E_{i})₋ ≠ X$, $E_{i} ⊆ E_{i+1}$, and $ ⋁_{i=1}^{∞} E_{i} = X$ then every automorphism of algℒ is quasi-spatial.