Math & Science ⇒ Formatting problem with formula

[johnnydarten]

Hi all,
I'm using Texmaker to write a scientific paper and I need to write something looking like the boxed formula in the attached picture...every time I write I cannot generate that shape accurately...Does anyone know how to do that?

Thanks in advance

[Stefan Kottwitz]

Hi Jonny,

welcome to the board!

Where's the problem? Is it the box or the def above the equal sign or the exponents?
Perhaps show us what you've got until now. That problem should not be difficult. I'm just travelling without a TeX compiler, but could return to your question in the evening.

Stefan

[johnnydarten]

Hi Stefan,

It is the exponent which I have problem with...simply it never comes out like that whatever I did. I made many trials but in vain. Do you know how to do it to look exactly like that?

Regards,

[Stefan Kottwitz]

Hi Jonny,

the mathdots package provides inverse diagonal dots by \iddots. Together with a small \raisebox correction for the last exponent:

Code: Select all

\documentclass{article}
\usepackage{amsmath}
\usepackage{mathdots}
\begin{document}
\[
2\uparrow\uparrow k\stackrel{\text{def}}{=}2^{2^{2^{\iddots^{\raisebox{-.5ex}{\tiny 2}}}}}
  \raisebox{.5\baselineskip}{\scriptsize$\bigg\}k$}
\]
\end{document}

exponents with diagonal dots

exponents.png (3.08 KiB) Viewed 2468 times

Stefan