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I am trying to write an expression but the output is noenter image description heret the same as expected.

Try:

$c_{j_{1}}^{L,n} = \displaystyle\sum_{m=1}^{M-1} (t_{j{_1}m})$ 

How can I correct it. Please help me.

  • 1
    Try ${c_{j_1}}^{L,n} = \displaystyle\sum_{m=1}^{M-1} (t_{j_1 m})$. – Henri Menke Mar 3 '16 at 15:18
  • @HenriMenke thanks a lot it is the exact answer of my problem. – limonik Mar 3 '16 at 15:22
2

This should be in display math mode:

\documentclass{article}
\usepackage{amsmath}

\begin{document}

\[
c_{j_{1}}{\!}^{L,n} = \sum_{m=1}^{M-1} t_{j^{}_{1}m}
\]

\end{document}

The \! backs up a little; the empty superscript for j pushes the subscript a bit down.

enter image description here

  • For complicated nested indices one may want to separate them with commas. For instance, in panel/time-series data, it is unclear what x_{2t-1} stands for at first glance (even for master students). If horizontal space is not an issue, you may write the last thing as t_{j_1,m} if it really has to be inline math. – Andreï Kostyrka Mar 3 '16 at 16:05

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