The rows of this ( {{1/3 - 2/3i,2/3i},{-2/3i,-1/3-2/3i}} - Wolfram|Alpha ) unitary matrix form an orthonormal set but, the columns of A do not form an orthonormal set despite this ( https://en.wikipedia.org/wiki/Unitar...ent_conditions ) Wikipedia article saying that they should.Could someone please help me understand why the columns of A do not form an orthonormal set for this unitary matrix?