The above image shows a bra vector, as opposed to the ket vector (which points to the right). These two are notations commonly used in quantum mechanics, and they are called bra-ket notation, invented by Paul Dirac.
In today's QM2 tutorial...
"You're a man, so it's important to know what's inside the bra." - Prof Berthold-Georg Englert
... to illustrate the importance of the exact notations inside the bra vector. Hmm...
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