How do I prove or show this? Not sure how to go about it.

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- Apr 2nd 2009, 03:39 PMCrakaIf matrix A is invertible then so it it transpose A^t
How do I prove or show this? Not sure how to go about it.

- Apr 2nd 2009, 04:13 PMo_O
If you can prove that both:

then by definition, we've shown that is invertible.

So for:

Use the fact that:

So we see that:

Now finish off by proving the other.