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 /  ___||  /_   _// |      \\   / _ \\      ___   
| // __     -| ||-  |  --  //  / //\ \\    /   || 
| \\_\ ||   _| ||_  |  --  \\ |  ___  ||  | [] || 
 \____//   /_____// |______// |_||  |_||   \__ || 
  `---`    `-----`  `------`  `-`   `-`     -|_|| 
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Text this: Self-consistent electronic structure of quantum wells by invariant embedding method