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MathType - The bra-ket notation devised by Paul Dirac is used in #QuantumPhysics as a way to make linear algebra operations more expressive. Of course, it is nothing but a rewriting of
Bra–ket notation - Wikipedia
How to Use Kets, the Hermitian Conjugate, and Bra-ket Notation - dummies
Bra–ket notation - Wikipedia
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bra/ket
How to Use Kets, the Hermitian Conjugate, and Bra-ket Notation - dummies
Bra–ket notation - Wikipedia
homework and exercises - A simple notation problem (bra ket notation) - Physics Stack Exchange
quantum mechanics - Bra-ket of products - Physics Stack Exchange