On the Classification of Codes over Non-Unital Ring of Order 4
In the last 60 years coding theory has been studied a lot over finite fields š½_q or commutative rings ā with unity. Although in 1993, a study on the classification of the rings (not necessarily commutative or ring with unity) of order p^2 had been presented, the construction of codes over non-commutative rings or non-commutative non-unital rings surfaced merely two years ago. In this letter, we extend the diverse research on exploring the codes over the non-commutative and non-unital ring E= āØ 2a=2b=0, a^2=a, b^2=b, ab=a, ba=b ā© by presenting the classification of optimal and nice codes of length nā¤7 over E, along-with respective weight enumerators and complete weight enumerators.
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