23.3.346 problem 349

Internal problem ID [6060]
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 : 349
Date solved : Tuesday, September 30, 2025 at 02:20:45 PM
CAS classification : [_Gegenbauer]

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

✓ Maple. Time used: 0.003 (sec). Leaf size: 31

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

\[ y = \ln \left (x +\sqrt {x^{2}-1}\right ) c_2 x -\sqrt {x^{2}-1}\, c_2 +c_1 x \]

✓ Mathematica. Time used: 0.053 (sec). Leaf size: 39

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

\begin{align*} y(x)&\to c_2 x \text {arctanh}\left (\frac {x}{\sqrt {x^2-1}}\right )-c_2 \sqrt {x^2-1}+c_1 x \end{align*}

✗ Sympy

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

False