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            ______    _____    __   __   _____    
  ____     /_   _//  / ____||  \ \\/ // |  __ \\  
 |    \\    -| ||-  / //---`'   \ ` //  | |  \ || 
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 |  __//   /_____//  \_____||    |_||   |_____//  
 |_|`-`    `-----`    `----`     `-`'    -----`   
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發送短信 : On some condition for a parameter dependence of the solution to a linear differential equation in the banach space