The components of the gradient of the one-form are denoted , or sometimes , and are given by
(Misner et al. 1973, p. 62). Note that Schmutzer (1968, p. 70) uses the older notation .
The components of the gradient of the one-form are denoted , or sometimes , and are given by
(Misner et al. 1973, p. 62). Note that Schmutzer (1968, p. 70) uses the older notation .
Weisstein, Eric W. "Comma Derivative." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/CommaDerivative.html