The gradient operator is
in 2 dimensions and
in 3 dimensions.
The laplacian operator in 3 dimensions is
Then
If
then
At the point
If
then
is said to be harmonic.
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The gradient operator isin 2 dimensions andin 3 dimensions.
The laplacian operator in 3 dimensions is
Then
Ifthen
At the point
Ifthenis said to be harmonic.