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Latex spaces

The simplest way to insert spaces in LaTeX equations, it to use tilde ~ to create a non breakable space. As an example, a~b displays  .


For more specific spaces, here is a list of spaces and size in math unit (mu, equal to 1/18 em, where em is taken from the math symbols family):

  • \quad space equal to the current font size (= 18 mu)
  • \! negative space (-3/18 of \quand = -3 mu)
  • \, narrow space (3/18 of  \quad = 3 mu)
  • \: average space (4/18 of  \quad = 4 mu)
  • \; wide space (5/18 of  = 5 mu)
  • \ (space after backlash) space in normal space
  • ~ non breakable space
  • \qquad : wider space (double \quad)


Here is an example:

\begin{align}
f(x) =&  ax^2 \! + \! bx \! + \! c \\
f(x) =&  ax^2 + bx + c \\
f(x) =&  ax^2 \, + \, bx \, + \, c \\
f(x) =&  ax^2 \: + \: bx \: + \: c \\
f(x) =&  ax^2 \; + \: bx \; + \; c \\
f(x) =&  ax^2 \  + \  bx \  + \  c \\
f(x) =&  ax^2 ~ + ~ bx ~ + ~ c \\
f(x) =& ax^2 \quad  + \quad  bx \quad  + \quad  c \\
f(x) =& ax^2 \qquad  + \qquad  bx \qquad  + \qquad  c 
\end{align}


The previous code displays:




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