Hi just a quick question.

I have a matrix $\displaystyle A$, and the inverse of this matrix, $\displaystyle A^{-1}$ is equal to the original, ie., $\displaystyle A = A^{-1}$.

What is the name for these type of matrices?

Thanks

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- Mar 25th 2010, 10:52 AMcraigEasy matrix question
Hi just a quick question.

I have a matrix $\displaystyle A$, and the inverse of this matrix, $\displaystyle A^{-1}$ is equal to the original, ie., $\displaystyle A = A^{-1}$.

What is the name for these type of matrices?

Thanks - Mar 25th 2010, 11:09 AMthepartymushroom
according to wikipedia:

"A matrix that is its own inverse is called an involution." - Mar 25th 2010, 11:13 AMcraig
Thank you!