I need to prove three things:

1) If A is hermitian and unitary, then A is involutory.

2) If A is hermitian and involutory, then A is unitary.

and

3) If A is unitary and involutory, then A is hermitian.

Thanks for any help.....

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- Nov 9th 2009, 11:02 AMbe more[SOLVED] Hermitian, Unitary, and Involutory Matrices
I need to prove three things:

1) If A is hermitian and unitary, then A is involutory.

2) If A is hermitian and involutory, then A is unitary.

and

3) If A is unitary and involutory, then A is hermitian.

Thanks for any help.....