Power indices on the left side

Question

I'm using {^2K} to write the indices on the left side, but when I do so I get an unwanted space between 2 en K. Is there another way to write the "power" indices on the left side?

\section*{text}
\fbox{\parbox{38em}{
\textbf{text} 
\textit{text}
\begin{eqnarray}
f^{(M)}(z)\underbrace{(K_1,K_2,\ldots,K_M)}_\text{operandi}= \sum\limits_{i=1}^m \sum\limits_{j_1=1}^m \sum\limits_{j_2=1}^m \ldots \sum\limits_{j_M=1}^m {^if_{j_1 j_2\ldots j_M}}{^{j_1}K_1}{^{j_2}K_2}\ldots{^{j_M}K_Me_i},
\end{eqnarray}
waarbij $z$ het argument is en
\begin{eqnarray}
K_t &=& [{^1K_t, ^2K_t,\ldots, ^mK_t}]^T \in \mathbb{R}^m, \qquad t = 1,2,\ldots,M, \nonumber \\
{^if_{j_1 j_2\ldots j_M}} &=& \frac{\partial^M{^if(z)}}{\partial^{j1}z\partial^{j2}z\ldots\partial^{jM}z},
\end{eqnarray}
}

The result that I get is this

I'd like to make the sapce there smaller, or to write {^2K_t} in another away.

PS how can I remove the unwanted space here

On the left side of what? You need to be way more specific in your question. — Svend Tveskæg, Nov 26 '13 at 14:17
on the left side of K as if you'd write K^2 but the 2 has to be on the elft side — vixero, Nov 26 '13 at 14:23
Can you add a little code example (MWE) to clarify what you want? If you are looking for something like chemical formulas, have a look at chemmacros or mhchem — Johannes_B, Nov 26 '13 at 14:25
@Fizunik: You can eliminate the space using \!. So in this case, you could say $^2\!K$ . Is that what you mean? — Jake, Nov 26 '13 at 14:27
Th space is there because of the italic of variables in the math mode. $^2$K or $^2\mathrm{K}$ don't have the space. — someonr, Nov 26 '13 at 14:31
and this is the code
\begin{eqnarray} K_t &=& [{^1!K_t, ^2!K_t,\ldots, ^m!K_t}]^T \in \mathbb{R}^m, \qquad t = 1,2,\ldots,M, \end{eqnarray} — vixero, Nov 26 '13 at 14:31
Please use align over eqnarray. See: http://texblog.net/latex-archive/maths/eqnarray-align-environment/ — Johannes_B, Nov 26 '13 at 14:32
@Fizunik Please add the example code to the question (with code blocks). Even better create a MWE — someonr, Nov 26 '13 at 14:32
You might also like the fouridx package, especially if you ever want an index on the left of a large symbol. — Chris Chudzicki, Nov 26 '13 at 14:40

score 6 · Answer 1 · answered Nov 26 '13 at 14:41

6

You can use the command \prescript of the maththools package.

See the following minimal working example:

\documentclass{article}

\usepackage{mathtools}

\begin{document}

\begin{equation*}
    \prescript{2}{}{K}
\end{equation*}

\end{document}

answered Nov 26 '13 at 14:41

crixstox

1,784

Power indices on the left side

1 Answers1