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- W4254184424 abstract "In this paper, we study a class of skew-constacyclic codes over R = ℤ4 + uℤ4, which is a non-chain extension of ℤ4. Some structural properties of R[x, θ] are discussed, where θ is an automorphism of R. We determine a necessary condition and a sufficient condition for these codes to be free, when they are principally generated. A Gray map over R is defined and some good codes are obtained using it. For even n, a relation between the generator polynomial of a code and that of its dual is obtained. Some examples are given to illustrate the results. Further, we have generalised these codes to double skew-constacyclic codes over R. Some good codes with improved minimum Lee distance over ℤ4 have been found via this class, and the same have been added to the database of ℤ4 codes." @default.
- W4254184424 created "2022-05-12" @default.
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- W4254184424 date "2017-01-01" @default.
- W4254184424 modified "2023-09-23" @default.
- W4254184424 title "A class of skew-constacyclic codes over ℤ<SUB align=right>4 + uℤ<SUB align=right>4" @default.
- W4254184424 doi "https://doi.org/10.1504/ijicot.2017.086918" @default.
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