\int_{\mathbb R^D} \Delta S \cdot S \, dx
= -\int_{\mathbb R^D} \nabla S\cdot \nabla S\, dx
= \mean{(\nabla S)^2}
I want to write average symbol on $(\nabla S)^2$
but it is not workig.
How can I write?
symbolswolfram-mathematica
\int_{\mathbb R^D} \Delta S \cdot S \, dx
= -\int_{\mathbb R^D} \nabla S\cdot \nabla S\, dx
= \mean{(\nabla S)^2}
I want to write average symbol on $(\nabla S)^2$
but it is not workig.
How can I write?
Best Answer
You probably mean:
or, as is suggested in comment
with the following result: