Link to actual problem [9909] \[ \boxed {x^{2} y^{\prime \prime \prime \prime }-y a=0} \]
type detected by program
{"unknown"}
type detected by Maple
[[_high_order, _with_linear_symmetries]]
Maple symgen result This shows Maple’s found \(\xi ,\eta \) and the corresponding canonical coordinates \(R,S\)\begin{align*} \\ \\ \end{align*}
\begin{align*} \left [\underline {\hspace {1.25 ex}}\xi &= 0, \underline {\hspace {1.25 ex}}\eta &= x \operatorname {BesselJ}\left (2, 2 a^{{1}/{4}} \sqrt {x}\right )\right ] \\ \left [R &= x, S \left (R \right ) &= \frac {y}{x \operatorname {BesselJ}\left (2, 2 a^{{1}/{4}} \sqrt {x}\right )}\right ] \\ \end{align*}
\begin{align*} \left [\underline {\hspace {1.25 ex}}\xi &= 0, \underline {\hspace {1.25 ex}}\eta &= x \operatorname {BesselY}\left (2, 2 a^{{1}/{4}} \sqrt {x}\right )\right ] \\ \left [R &= x, S \left (R \right ) &= \frac {y}{x \operatorname {BesselY}\left (2, 2 a^{{1}/{4}} \sqrt {x}\right )}\right ] \\ \end{align*}
\begin{align*} \left [\underline {\hspace {1.25 ex}}\xi &= 0, \underline {\hspace {1.25 ex}}\eta &= x \operatorname {BesselJ}\left (2, 2 \sqrt {-\sqrt {a}}\, \sqrt {x}\right )\right ] \\ \left [R &= x, S \left (R \right ) &= \frac {y}{x \operatorname {BesselJ}\left (2, 2 \sqrt {-\sqrt {a}}\, \sqrt {x}\right )}\right ] \\ \end{align*}
\begin{align*} \left [\underline {\hspace {1.25 ex}}\xi &= 0, \underline {\hspace {1.25 ex}}\eta &= x \operatorname {BesselY}\left (2, 2 \sqrt {-\sqrt {a}}\, \sqrt {x}\right )\right ] \\ \left [R &= x, S \left (R \right ) &= \frac {y}{x \operatorname {BesselY}\left (2, 2 \sqrt {-\sqrt {a}}\, \sqrt {x}\right )}\right ] \\ \end{align*}