Finding the value of the matrix $X$:
$$X^tAB - I = X^t$$
I noticed that the next step chosen by my book is
$$X^t(AB-I) = I$$
It's not clear to me how did they reach that. How did they go from one step to the other, exactly?
Finding the value of the matrix $X$:
$$X^tAB - I = X^t$$
I noticed that the next step chosen by my book is
$$X^t(AB-I) = I$$
It's not clear to me how did they reach that. How did they go from one step to the other, exactly?
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This is just:$$X^tAB - I = X^t \iff X^tAB - X^t = I \iff X^t(AB - I) = I $$