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A New Directional Algebraic Fast Multipole Method Based Iterative Solver for the Lippmann-Schwinger Equation Accelerated with HODLR Preconditioner. Commun. Comput. Phys. [Internet]. 2022 Oct. 28 [cited 2026 Mar. 14];32(4):1061-93. Available from: https://gsp.tricubic.dev/cicp/article/view/7109