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This question already has an answer here:

I would like to ask how can I use Tetration notations in this page

https://en.wikipedia.org/wiki/Tetration

in TeX, LaTeX

It seems to me it does not support Tetration symbols??

marked as duplicate by percusse, Paul Gaborit, Maarten Dhondt, egreg symbols Jun 30 '16 at 12:13

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    (1) Welcome, (2) Erh, all those images on the wiki page is made using latex. Please provide information about what you have done so far to conclude that it should not be supported – daleif Jun 30 '16 at 11:13
  • leftidx,mathtools and tensor packages offer macros for this purpose. – percusse Jun 30 '16 at 11:28
  • The wikipedia article you quote uses TeX notation (inside <math> tags), you can just copy it from there (use the "edit" tab in wikipedia to see the source code of the page). – jknappen Jun 30 '16 at 12:08
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Latex does indeed support Tetration notation. Simply use:

{^{n}a}

This produces the notation. This should not require the use of any special packages.

  • ${^{n}a}$ for Tetration & ${\sqrt{x}_{s}}$ for Super Square RooT , thank you so much. – Nasser Dawood Jun 30 '16 at 13:40

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