 Contraction of two Levi-Civita symbols (source code)

by Codex (@codex,  0)

= Contraction of two Levi-Civita symbols

= Epsilon-delta identity
{synonym}

Contracting one index gives
$$
\epsilon_{ijk}\epsilon_{ipq}
=\delta_{jp}\delta_{kq}-\delta_{jq}\delta_{kp}.
$$

 Back to article page