I would like to insert the below mathematical symbol, it looks like a big Delta but different. Is there command to obtain a similar shape?
[Tex/LaTex] A particular big Delta
greeksymbols
Related Solutions
Note that the document uses Springer's LNCS style. In this style, all Greek letters are in italics, and vectors are denoted by boldface.
Most likely the bold italic Delta is produced in this particular case by something similar to this:
\documentclass{llncs}
\begin{document}
$\vec{\Delta}$
\end{document}
The result is:
Note that if you used the article class, the same code would produce a normal Delta with an arrow:
If you use the D'Alembert operator as well, you might find pretty using the symbol \bigtriangleup for your Laplace operator, in order to get a similar look as the \Box symbol that is being used for D'Alambertian. In the following, a tricky construction with \mathop and \mathbin is used to get the proper spacing:
\documentclass{article}
\usepackage{amsmath,amssymb}
\newcommand*\Laplace{\mathop{}\!\mathbin\bigtriangleup}
\newcommand*\DAlambert{\mathop{}\!\mathbin\Box}
\pagestyle{empty}
\begin{document}
\begin{gather*}
\phi(1+\Laplace A) \neq \phi(1+\Delta A)
\\
\phi(1+\DAlambert A) \neq \phi(1+\Laplace A)
\\
f\Laplace g
\end{gather*}
\end{document}
Best Answer
It is the following Greek character:
\varDelta. It requieresamsmath.