發送短信 : Repeated-root constacyclic codes of prime power lengths over finite chain rings

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