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A binary code is called an even code if the Hamming weight of each of its codewords is even. An even code should have a generator polynomial that include (1+x) minimal polynomial as a product. Furthermore, a binary code is called doubly even if the Hamming weight of all its codewords is divisible by 4. An even code which is not doubly even is said to be strictly even.
 | This article relies largely or entirely on a single source. (October 2023) |
Examples of doubly even codes are the extended binary Hamming code of block length 8 and the extended binary Golay code of block length 24. These two codes are, in addition, self-dual.
This article incorporates material from even code on PlanetMath, which is licensed under the Creative Commons Attribution/Share-Alike License.
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