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  ______     ___     _    _      ___     __   _   
 /_   _//   / _ \\  | \  / ||   / _ \\  | || | || 
 `-| |,-   | / \ || |  \/  ||  / //\ \\ | '--' || 
   | ||    | \_/ || | .  . || |  ___  ||| .--. || 
   |_||     \___//  |_|\/|_|| |_||  |_|||_|| |_|| 
   `-`'     `---`   `-`  `-`  `-`   `-` `-`  `-`

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Text this: Discretization of two-dimensional Luneburg lens based on the correctional effective medium theory