d'Alembert operator
Englisch
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d'Alembert operator
noun
—
(physics) A differential operator which may be expressed as \partial_\mu \partial^\mu = \sum_{\mu = 0}^3 {\partial \over \partial x^\mu}{\partial \over \partial x_\mu}; it is the four-dimensional (Minkowski space) equivalent of the three-dimensional Laplace operator.
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