1

I have some variables defined in a column vector written in mathmode in the usual way

$\begin{bmatrix} \dfrac{1}{i} \\ \dfrac{1}{j} \end{bmatrix}$

However, the result shows that they are almost touching each other like this: enter image description here

Is there a way to somehow expand the vector brackets so that there is some space between the i and the 1? Like a vertical \thinspace

egreg
  • 1,121,712
Fraïssé
  • 3,139
  • Try \\[2ex] (experiment with different figures) – egreg Jun 06 '16 at 21:10
  • (use {} not " markup for code sections) you can add space after \\[2cm] but why are you using \dfrac here not \frac that is a major cause of the problem, forcing the fractions to be over-large for the context. – David Carlisle Jun 06 '16 at 21:10
  • in this case you should also be able to add \mathstrut to the denominator of the top fraction to give it some depth. but, as pointed out elsewhere, it's really bad form to use display-style fractions in in-line math, and doubly bad to use them in an in-line matrix. – barbara beeton Jun 06 '16 at 21:19

2 Answers2

2

\\ has an optional parameter. You can write (precise values according to you taste):

\[
\begin{bmatrix} \dfrac{1}{i} \\[18pt] % here - PS
 \dfrac{1}{j} \end{bmatrix}
\]

I have changed $...$ to \[...\] because so high matrix in text mode is not a good idea.

Przemysław Scherwentke
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0
\documentclass{amsart}

\begin{document}

\begin{equation}
\renewcommand*{\arraystretch}{2}
\begin{bmatrix} \dfrac{1}{i} \\ \dfrac{1}{j} \end{bmatrix}
\end{equation}
\end{document}
JPi
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