math-operatorsrelation-symbols
In programming -=, += and other similar operators are quite popular. But I am unable to write such operator nicely in Latex equations.
For example when I use x += \frac{\partial C}{\partial x} I get the following formula:
The problem is that += are kind of too far apart. Is there any latex operator which allows to write them closer together?
Saying \limits does not increase the size of the summation symbol, it just moves the limits.
\documentclass{article}
\usepackage{amsmath}
\begin{document}
$\sum\limits_{i=1}^n$ \quad $\sum_{i=1}^n$ \quad
\end{document}
If you want to do the same with the \natural symbol you need to use \mathop.
$\natural_{i=1}^n$ \quad $\mathop\natural\limits_{i-1}^n$
If you actually want a larger \natural you can create one with \large, \Large, etc.
\[ \mathop{\hbox{\Large$\natural$}}\limits_{i=1}^n \natural \]
You could also use \scalebox from the graphicx package.
I use a \Centerstack to accomplish the stack. I place the top and bottom items in a \mathsf wrapper, and I introduce \coresym[scale]{symbol}{subscript/superscript} to center the core symbol and scale it as needed.
\documentclass{article}
\usepackage{graphicx}
\usepackage[usestackEOL]{stackengine}
\newcommand\coresym[3][1]{\phantom{#3}\scalebox{#1}{$#2$}#3}
\setstackgap{L}{.9\baselineskip}
\stackMath
\begin{document}
\[
\Centerstack{\mathsf{G} \\ \coresym[1.3]{*}{^1_2} \\ \mathsf{G}} = ax + b
\]
\end{document}
I also shrunk the stacking gap between items to .9\baselineskip, but that can be changed to suit. Here it is shrunk to .7\baselineskip.
Best Answer
You can use
that will add no space between the + and the = signs and treat the whole block as a single relation symbol.
Of course a definition will do better:
and
would print