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  ______    _____     _____    _    _    _    _   
 /_____//  |  ___||  /  ___|| | || | || | |  | || 
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 `__ `     |_____||  \____//   \____//  |_// \_|| 
 /_//      `-----`    `---`     `---`   `-`   `-` 
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Text this: Rectangular coordinates state estimation of electrical power system using singular value decomposition