In special relativity, electromagnetism and wave theory, the d'Alembert operator (denoted by a box: ◻ {\displaystyle \Box } ), also called the d'Alembertian, wave operator, box operator or sometimes quabla operator (cf. nabla symbol) is the Laplace operator of Minkowski space.
In special relativity, electromagnetism and wave theory, the d'Alembert operator (denoted by a box: ◻ {\displaystyle \Box } ), also called the d'Alembertian, wave operator, box operator or sometimes quabla operator (cf. nabla symbol) is the Laplace operator of Minkowski space.
Source: Wikipedia "D'Alembert operator" · CC BY-SA 4.0
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