DLMF:30.13.E5
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Math Formula Information
Formula: Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle h_{\phi}^{2}=\left(\pderiv{x}{\phi}\right)^{2}+\left(\pderiv{y}{\phi}\right)^{2}+\left(\pderiv{z}{\phi}\right)^{2}=c^{2}(\xi^{2}-1)(1-\eta^{2}).}
Name: DLMF:30.13.E5
Description:
Data Source
https://lct.wmflabs.org/w/index.php?title=Special:EntityPage/Q8918