What is the correct symbol to use for the Laplace operator? It looks almost like the big Delta $\Delta$
, but it should look different so that it is not confused with the Delta.
Currently, I use $\vec \nabla^2$
, which is unambiguous, but not pretty.
Best Answer
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: