Diederich-Fornæss index and global regularity of the complex Green operator: domains with comparable Levi eigenvalues

Let $Ω\subset \mathbb{C}^{n}$, with $n \geq 3$, be a smooth bounded pseudoconvex domain satisfying the symmetric eigenvalue comparability condition $D(q_0)$ for some $1\le q_0\le n-2$. We show that if the Diederich-Fornaess-index of $Ω$ is one, then the complex Green operator $G_q$, associated with $Ω$, is globally regular for $q$ in the range $\min\{q_0,\, n - 1 - q_0\} \leq q \leq \max\{q_0,\, n - 1 - q_0\}$.

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