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 
.
Comma Derivative
See also
Covariant Derivative, Derivative, TensorExplore with Wolfram|Alpha
References
Misner, C. W.; Thorne, K. S.; and Wheeler, J. A. Gravitation. San Francisco, CA: W. H. Freeman, 1973.Schmutzer, E. Relativistische Physik (Klassische Theorie). Leipzig, Germany: Akademische Verlagsgesellschaft, 1968.Referenced on Wolfram|Alpha
Comma DerivativeCite this as:
Weisstein, Eric W. "Comma Derivative." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/CommaDerivative.html