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  _____      ___      _____      ___     ______   
 / ____||   / _ \\   / ____||   / _ \\  |      \\ 
/ //---`'  | / \ || / //---`'  / //\ \\ |  --  // 
\ \\___    | \_/ || \ \\___   |  ___  |||  --  \\ 
 \_____||   \___//   \_____|| |_||  |_|||______// 
  `----`    `---`     `----`  `-`   `-` `------`

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