info prev up next book cdrom email home

Comma Derivative

\begin{eqnarray*}
A_{,k} &\equiv& {\partial A\over\partial x^k} \equiv \partial...
...over g_k} {\partial A^k\over \partial x^k} \equiv\partial_k A^k.
\end{eqnarray*}



See also Covariant Derivative, Semicolon Derivative




© 1996-9 Eric W. Weisstein
1999-05-26