Ax=0 has only trivial solution if A is row equivalent to I. Here in theorem 6 they explain it by referring to another theorem 4 in my book:(adsbygoogle = window.adsbygoogle || []).push({});

Theorem 6

http://bildr.no/view/1032481

Theorem 4:

http://bildr.no/view/1032482

Why is it so that if A is invertible Ax=0 only has trivial solution for x.

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# Why Ax=0 only has trivial solution

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