Link to actual problem [1310] \[ \boxed {9 x^{2} y^{\prime \prime }+9 y^{\prime } x -\left (3 x +1\right ) y=0} \] With the expansion point for the power series method at \(x = 0\).
type detected by program
{"second order series method. Regular singular point. Difference not integer"}
type detected by Maple
[[_2nd_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 &= \operatorname {BesselI}\left (\frac {2}{3}, \frac {2 \sqrt {3}\, \sqrt {x}}{3}\right )\right ] \\ \left [R &= x, S \left (R \right ) &= \frac {y}{\operatorname {BesselI}\left (\frac {2}{3}, \frac {2 \sqrt {3}\, \sqrt {x}}{3}\right )}\right ] \\ \end{align*}
\begin{align*} \left [\underline {\hspace {1.25 ex}}\xi &= 0, \underline {\hspace {1.25 ex}}\eta &= \operatorname {BesselK}\left (\frac {2}{3}, \frac {2 \sqrt {3}\, \sqrt {x}}{3}\right )\right ] \\ \left [R &= x, S \left (R \right ) &= \frac {y}{\operatorname {BesselK}\left (\frac {2}{3}, \frac {2 \sqrt {3}\, \sqrt {x}}{3}\right )}\right ] \\ \end{align*}