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searching for D'Alembert operator 1 found (37 total)

Hertz vector (1,362 words) [view diff] exact match in snippet view article find links to article

the wave equation for each. This is simply done by applying the d'Alembert operator ◻ = ( ∇ 2 − 1 c 2 ∂ 2 ∂ t 2 ) {\displaystyle \Box =\left(\nabla ^{2}-{\frac