3

How do you get the \delta\rightarrow 0 underneath the line underneath the limit.

This is what I have so far

\underline{\lim\limits}_{\delta \rightarrow 0}
2
\documentclass{article}
\usepackage{amsmath}
\begin{document}
  $\lim\limits_{\overline{δ\rightarrow 0}}$
\end{document}

enter image description here

  • Not my best choice, actually. – egreg Oct 8 '14 at 11:47
8

You have a dedicated command for that: \varliminf. There also exists a \varlimsup command. Likewise, in another domain of maths, we have \varinjlim and \varprojlim commands:

\documentclass{article}

\usepackage{mathtools}

\begin{document}

\begin{alignat*}{2}
    & \varliminf_{δ \to 0} &\qquad &\varinjlim_{i ∈ I}E_i \\
    & \varlimsup_{δ \to 0} & & \varprojlim_{i ∈ I}E_i
\end{alignat*}

\end{document} 

enter image description here

  • Actually amsmath is sufficient. – egreg Oct 8 '14 at 11:59
  • 2
    @egreg: I know that; mathtools should be systematically loaded, in my opinion, and my predefined templates load it. – Bernard Oct 8 '14 at 12:10

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