Differences Between DAlembertian & Laplacian Operators

[Muthumanimaran]

what are the differences between D'Alembertian and Laplacian operator? while reading Electrodynamics by Griffiths I learned that Laplacian operator is used in non-relativistic cases and D'Alembertian operator is used in relativistic cases, But i don't what is the difference between these operators

 

[jedishrfu]

The laplacian is a 3D operator whereas the Delambertian is 4D operator with a time dirivative added. It's basically a Laplacian for Minkowski spacetime invariant under Lorentz transformations.

http://en.m.wikipedia.org/wiki/D'Alembert_operator