I would like to type bra-keted expression
into the document. How do I do that?
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The Docs support a little bit of TeX syntax, but apparently not \langle and \rangle. It seems the best we can do is to use Unicode characters:
U+27E8 ⟨ Mathematical left angle bracket U+27E9 ⟩ Mathematical right angle bracket
There may be a way to type these, but I haven't succeeded, and just copy-pasted them from Wikipedia page for this Unicode block
They look good in a formula, except that, being ordinary characters, they don't scale with the size of the expression they contain.