DLMF:1.5.E13
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Math Formula Information
Formula: Failed to parse (unknown function "\pderiv"): {\displaystyle \nabla^{2}f=\pderiv[2]{f}{x}+\pderiv[2]{f}{y}=\pderiv[2]{f}{r}+\frac{1}{r}\pderiv{f}{r}+\frac{1}{r^{2}}\pderiv[2]{f}{\phi}.}
Name: DLMF:1.5.E13
Description:
Data Source
https://lct.wmflabs.org/w/index.php?title=Special:EntityPage/Q132