In Theorem 3.37, prove that if B = A, then PGx = 0 for every x in
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In Theorem 3.37, prove that if B = A, then PGx = 0 for every x in Z^{k}_{2}.
(Throughout this proof we denote by ai the ith column of a matrix A.) With P and G as in the statement of the theorem, assume first that they are standard parity check and generator matrices for the same binary code. Therefore, for every x in Z^{k}_{2},PGx 0. In terms of block multiplication,
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[B 1] x = 0 for all x in Z A
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Let Be a standard generator matrix and P B I nk be a standard parity ...View the full answer
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