DLMF:30.13.E6

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 \nabla^{2}=\frac{1}{h_{\xi}h_{\eta}h_{\phi}}\left(\pderiv{}{\xi}\left(\frac{h_{\eta}h_{\phi}}{h_{\xi}}\pderiv{}{\xi}\right)+\pderiv{}{\eta}\left(\frac{h_{\xi}h_{\phi}}{h_{\eta}}\pderiv{}{\eta}\right)+\pderiv{}{\phi}\left(\frac{h_{\xi}h_{\eta}}{h_{\phi}}\pderiv{}{\phi}\right)\right)=\frac{1}{c^{2}(\xi^{2}-\eta^{2})}\left(\pderiv{}{\xi}\left((\xi^{2}-1)\pderiv{}{\xi}\right)+\pderiv{}{\eta}\left((1-\eta^{2})\pderiv{}{\eta}\right)+\frac{\xi^{2}-\eta^{2}}{(\xi^{2}-1)(1-\eta^{2})}\pderiv[2]{}{\phi}\right).}

Name: DLMF:30.13.E6

Description:

Data Source

https://lct.wmflabs.org/w/index.php?title=Special:EntityPage/Q8919