If we have a matrix M with a kernel, in many cases there exists a projection operator P onto the kernel of M satisfying [P,M]=0. It seems to me that this projector does not in general need to be an orthogonal projector, but it is probably unique if it exists. My question: is there a standard name for such a projector among math people?(adsbygoogle = window.adsbygoogle || []).push({});

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# Projection onto the kernel of a matrix

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