Formula:904

Digital Library of Mathematical Functions ID 2.8.E3

${\displaystyle{\displaystyle\frac{{\mathrm{d}}^{2}W}{{\mathrm{d}\xi}^{2}}=\left(u^{2}\dot{z}^{2}f(z)+\psi(\xi)\right)W,}}$

Symbols List

• ${\displaystyle{\displaystyle\frac{\mathrm{d}\NVar{f}}{\mathrm{d}\NVar{x}}}}$: derivative of $$f$$ with respect to $$x$$
• ${\displaystyle{\displaystyle f(x)}}$: function
• ${\displaystyle{\displaystyle u}}$: large real or complex parameter
• ${\displaystyle{\displaystyle W}}$: change of variable
• ${\displaystyle{\displaystyle\psi(\xi)}}$: function
 

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