Math & Science ⇒ Integral bounds containing subscripts

[jaybz]

How can I create a integral that has a variable with these subscripts in it's upper and lower bound?
I can use:

Code: Select all

\documentclass[11pt]{article}
\usepackage{mathtools}
\begin{document}
\int_{t_i}^t
\end{document}

But the minute I add the subscript on the upper limit it doesn't work.

Code: Select all

\documentclass[11pt]{article}
\usepackage{mathtools}
\begin{document}
\int_{t_i}^t_f
\end{document}

[Stefan Kottwitz]

Simply use braces also for the upper limit:

Code: Select all

\documentclass[11pt]{article}
\usepackage{mathtools}
\begin{document}
\[
  \int_{t_i}^{t_f}
\]
\end{document}

integral.png (1.62 KiB) Viewed 8171 times

Stefan

[jaybz]

Thanks, I could have sworn I tried that. I was tired. Thanks.
I don't usually use displaystyle math though but if I don't when using those subscripts it's way too cramped.

Code: Select all

\documentclass[11pt]{article}
\usepackage{mathtools}
\begin{document}
    $\int_{t_i}^{t_f}$
\end{document}

How can I reduce the subscript size so I don't have to use displaystyle math? \scriptscriptstyle doesn't seam to work.