How to Use Kets, the Hermitian Conjugate, and Bra-ket Notation - dummies
MathType on X: "The bra-ket #Notation devised by Paul Dirac is used in #QuantumPhysics as a way to make linear algebra operations more expressive. It consists of a rewriting of your usual
quantum mechanics - Expectation Value in Bra-ket notation - Physics Stack Exchange