Ket notation Mathematically, I )is a column vector And is a row vector (yllo) is the inner product between the vectors|φ)and|y) ·吵|Mly) is just the quadratic form yb MylKet notation • Mathematically, ⋅ is a column vector. • And ⋅ is a row vector. • 𝜓 𝜙 is the inner product between the vectors 𝜙 and 𝜓 . • 𝜓 𝑀 𝜓 is just the quadratic form 𝜓 𝑇𝑀𝜓