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  ____       ___       _____   __   __    ____    
 |  _ \\    / _ \\    / ___//  \ \\/ //  |  _ \\  
 | |_| ||  / //\ \\   \___ \\   \ ` //   | |_| || 
 | .  //  |  ___  ||  /    //    | ||    | .  //  
 |_|\_\\  |_||  |_|| /____//     |_||    |_|\_\\  
 `-` --`  `-`   `-` `-----`      `-`'    `-` --`

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Text this: A unified linear convergence analysis of k-SVD