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Continue to ChatSingular Degenerate Normal Operators For First-Order - https://avesis.ktu.edu.tr/publication/details/e18ea17c-8191-49e8-b3c2-4af8e8f7be18/singular-degenerate-normal-operators-for-first-order
Singular Degenerate Normal Operators For First-Order - https://avesis.ktu.edu.tr/publication/details/e18ea17c-8191-49e8-b3c2-4af8e8f7be18/singular-degenerate-normal-operators-for-first-order