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Text this: On constacyclic codes of length 4ps over F<inf>pm</inf>+uF<inf>pm</inf>

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|_____//   |_____||  /_____||  /_____//  /____//  
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Text this: On constacyclic codes of length 4p<sup>s</sup> over F<inf>p<sup>m</sup></inf>+uF<inf>p<sup>m</sup></inf>