Del in cylindrical and spherical coordinates
= Del in cylindrical and spherical coordinates
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This collects the <gradient>, <divergence>, <curl> and <Laplacian> formulas in cylindrical and <spherical coordinates>. Coordinate <unit vectors> vary with position, so taking their derivatives is essential when translating <vector calculus> operators from Cartesian coordinates. <Curl in spherical coordinates> is one of these formulas.