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In Dirac Notation of [quantum mechanics], the representation of a state. [The complex] conjugate of a ket. Denoted as <f| where f can be a wave function or a set of quantum numbers. Analogous to a row vector in [linear algebra]. The name originates from separating a bracket ( <f|f'> ) into a bra ( <f| ) and a ket ( |f'> ).
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