Left and right subscript / superscript

There are many tools for scripts:

  • For general math scripts before something, use \prescript provided by mathtools package, for better alignment:

    $ \prescript{14}{2}{\mathbf{C}} $

  • For large operators, use \sideset from amsmath:

    $ \sideset{_a^b}{'}\sum A_n $

  • For chemical equations, use mhchem package:

    \ce{^{227}_{90}Th+}

  • For tensors, use tensor package:

    $ M\indices{^a_b^{cd}_e} $
    $ \tensor[^a_b^c_d]{M}{^a_b^c_d} $

Please complete this list as you can.


Are you doing this in math mode?

${}_{t}p_{x}$

should work.


The tensor package will do exactly what you require, and more. For your particular case, you need only type

\tensor[_t]{p}{_x}

Regards