Wednesday, 13 April 2016

matrices - Sufficient condition for the inverse of a matrix

Let A be a square matrix. Another square matrix B is called inverse of A if AB=BA=I. My question is whether just AB=I or BA=I is not sufficient to call B as the inverse of A? If it is not, then give a counter example where AB=I, but ABBA.

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real analysis - How to find limhrightarrow0fracsin(ha)h

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