23.3.255 problem 257

Internal problem ID [5969]
Book : Ordinary differential equations and their solutions. By George Moseley Murphy. 1960
Section : Part II. Chapter 3. THE DIFFERENTIAL EQUATION IS LINEAR AND OF SECOND ORDER, page 311
Problem number : 257
Date solved : Tuesday, September 30, 2025 at 02:07:04 PM
CAS classification : [[_2nd_order, _with_linear_symmetries]]

\begin{align*} -\left (\left (-1+n \right ) n -a^{2} x^{2}\right ) y+x^{2} y^{\prime \prime }&=0 \end{align*}

✓ Maple. Time used: 0.003 (sec). Leaf size: 27

ode:=-((n-1)*n-a^2*x^2)*y(x)+x^2*diff(diff(y(x),x),x) = 0; 
dsolve(ode,y(x), singsol=all);
 

\[ y = \left (\operatorname {BesselJ}\left (n -\frac {1}{2}, a x \right ) c_1 +\operatorname {BesselY}\left (n -\frac {1}{2}, a x \right ) c_2 \right ) \sqrt {x} \]

✓ Mathematica. Time used: 0.02 (sec). Leaf size: 36

ode=-(((-1 + n)*n - a^2*x^2)*y[x]) + x^2*D[y[x],{x,2}] == 0; 
ic={}; 
DSolve[{ode,ic},y[x],x,IncludeSingularSolutions->True]
 

\begin{align*} y(x)&\to \sqrt {x} \left (c_1 \operatorname {BesselJ}\left (n-\frac {1}{2},a x\right )+c_2 \operatorname {BesselY}\left (n-\frac {1}{2},a x\right )\right ) \end{align*}

✓ Sympy. Time used: 0.068 (sec). Leaf size: 41

from sympy import * 
x = symbols("x") 
a = symbols("a") 
n = symbols("n") 
y = Function("y") 
ode = Eq(x**2*Derivative(y(x), (x, 2)) + (a**2*x**2 - n*(n - 1))*y(x),0) 
ics = {} 
dsolve(ode,func=y(x),ics=ics)
 

\[ y{\left (x \right )} = \sqrt {x} \left (C_{1} J_{\sqrt {n \left (n - 1\right ) + \frac {1}{4}}}\left (a x\right ) + C_{2} Y_{\sqrt {n \left (n - 1\right ) + \frac {1}{4}}}\left (a x\right )\right ) \]