# Talk:Parity-check matrix

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## Definition

Should the code definition be Hc^T=0 instead of H^Tc=0? --169.235.24.187 (talk) 00:32, 12 March 2009 (UTC)

Depends on which book you read it from. Either way, this article could do with some consistency, in choice of symbols too. 80.6.149.158 (talk) 13:55, 24 May 2010 (UTC)

## Creating Parity-check matrix

The two equations for G and H only hold if the linear code is systematic. I propose a change to indicate so. Phosphoricx (talk) 03:38, 24 April 2008 (UTC)

I think, the is a minus missing in the equation for H. In the current form it is only correct for binary codes. However, the explanation for binary codes is there, but not for code using other finite fields. If I am correct, it is

${\displaystyle H={\begin{bmatrix}-P^{T}|I_{n-k}\end{bmatrix}}}$

--Sporenfrosch (talk) 00:33, 21 January 2009 (UTC)