Quantum Mechanics: Concepts and Applications · Problem 2.13

Mathematical Tools of Quantum Mechanics — Nouredine Zettili

Physics — Quantum Mechanics · inverse-matrix

Problem

Calculate the inverse of the matrix

A = \begin{pmatrix} 2 & i & 0 \\ 3 & 1 & 5 \\ 0 & -i & -2 \end{pmatrix}

. Is this matrix unitary?