2018-10-09

  • Product of two epsilons
    \epsilon_{ijk} \epsilon_{lmn} = \left | \begin{array}{cccc} \delta_{il} & \delta_{im} & \delta_{in} \\ \delta_{jl} & \delta_{jm} & \delta_{jn}\\ \delta_{kl} & \delta_{km} & \delta_{kn} \end{array} \right |

  • Contractions of epsilons


  • gradient of a vector field

  • directional derivative

  • unit surface normal for

  • the unit tangent to the curve given that s is the arc length

  • Divergence

  • Curl

  • NB: is only constant in Cartesian coordinates when calculating using vector differential operators

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