Internal problem ID [2541]
Internal file name [OUTPUT/2033_Sunday_June_05_2022_02_45_37_AM_84665228/index.tex]
Book: Mathematical methods for physics and engineering, Riley, Hobson, Bence, second edition,
2002
Section: Chapter 16, Series solutions of ODEs. Section 16.6 Exercises, page 550
Problem number: Problem 16.13.
ODE order: 2.
ODE degree: 1.
The type(s) of ODE detected by this program : "second_order_bessel_ode", "second order series method. Irregular singular point"
Maple gives the following as the ode type
[[_Emden, _Fowler]]
Unable to solve or complete the solution.
\[ \boxed {y^{\prime \prime }+\frac {y}{z^{3}}=0} \] With the expansion point for the power series method at \(z = 0\).
The type of the expansion point is first determined. This is done on the homogeneous part of the ODE. \[ y^{\prime \prime }+\frac {y}{z^{3}} = 0 \] The following is summary of singularities for the above ode. Writing the ode as \begin {align*} y^{\prime \prime }+p(z) y^{\prime } + q(z) y &=0 \end {align*}
Where \begin {align*} p(z) &= 0\\ q(z) &= \frac {1}{z^{3}}\\ \end {align*}
Combining everything together gives the following summary of singularities for the ode as
Regular singular points : \([\infty ]\)
Irregular singular points : \([0]\)
Since \(z = 0\) is not an ordinary point, then we will now check if it is a regular singular point. Unable to solve since \(z = 0\) is not regular singular point. Terminating.
Verification of solutions N/A
Maple trace
`Methods for second order ODEs: --- Trying classification methods --- trying a quadrature checking if the LODE has constant coefficients checking if the LODE is of Euler type trying a symmetry of the form [xi=0, eta=F(x)] checking if the LODE is missing y -> Trying a Liouvillian solution using Kovacics algorithm <- No Liouvillian solutions exists -> Trying a solution in terms of special functions: -> Bessel <- Bessel successful <- special function solution successful`
✗ Solution by Maple
Order:=6; dsolve(diff(y(z),z$2)+1/z^3*y(z)=0,y(z),type='series',z=0);
\[ \text {No solution found} \]
✓ Solution by Mathematica
Time used: 0.037 (sec). Leaf size: 222
AsymptoticDSolveValue[y''[z]+1/z^3*y[z]==0,y[z],{z,0,5}]
\[ y(z)\to c_1 e^{-\frac {2 i}{\sqrt {z}}} z^{3/4} \left (-\frac {468131288625 i z^{9/2}}{8796093022208}+\frac {66891825 i z^{7/2}}{4294967296}-\frac {72765 i z^{5/2}}{8388608}+\frac {105 i z^{3/2}}{8192}+\frac {33424574007825 z^5}{281474976710656}-\frac {14783093325 z^4}{549755813888}+\frac {2837835 z^3}{268435456}-\frac {4725 z^2}{524288}+\frac {15 z}{512}-\frac {3 i \sqrt {z}}{16}+1\right )+c_2 e^{\frac {2 i}{\sqrt {z}}} z^{3/4} \left (\frac {468131288625 i z^{9/2}}{8796093022208}-\frac {66891825 i z^{7/2}}{4294967296}+\frac {72765 i z^{5/2}}{8388608}-\frac {105 i z^{3/2}}{8192}+\frac {33424574007825 z^5}{281474976710656}-\frac {14783093325 z^4}{549755813888}+\frac {2837835 z^3}{268435456}-\frac {4725 z^2}{524288}+\frac {15 z}{512}+\frac {3 i \sqrt {z}}{16}+1\right ) \]