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braket – Dirac bra-ket and set notations
Provides macros to typeset bra-ket notation, as well as set specifiers, with a single (“|”) or a double (“||” or (“\|”) vertical bar specifier in between two bracketed parts. Each macro comes in a fixed-size version and an expanding version.
If the package finds itself operating under e-tex, it uses the extended primitive \middle for more reliable results
Public Domain Software|
|Contained in||TeX Live as braket|
|MiKTeX as braket|
support for typesetting physics documents|
support for typesetting mathematics