TY - RPRT TI - A Butterfly-Accelerated Volume Integral Equation Solver for Broad Permittivity and Large-Scale Electromagnetic Analysis AU - Sayed, Sadeed Bin AU - Liu, Yang AU - Gomez, Luis J. AU - Yucel, Abdulkadir C. PY - 2021 DO - 10.1109/tap.2021.3137193 UR - https://www.osti.gov/biblio/1881465 ID - 1881465 ER -