Extramples

Here I show some examples with a discussion of peculiar issues. Some other also interesting remarks can be found in the bout page of TTao’s blog What’s .

Example 1

\langle q | f ( \hat{q} ) = f (q) \langle q |

$\langle q | f ( \hat{q} ) = f (q) \langle q |$

Notice that the \left and \right are not necessary in this case, however, if used it will work:

\left \langle q | f ( \hat{q} ) = f (q) \langle q |