29.20.24 problem 571

Internal problem ID [5165]
Book : Ordinary differential equations and their solutions. By George Moseley Murphy. 1960
Section : Various 20
Problem number : 571
Date solved : Sunday, March 30, 2025 at 06:46:26 AM
CAS classification : [_separable]

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

✓ Maple. Time used: 0.012 (sec). Leaf size: 29

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

\[ y = x \,{\mathrm e}^{\frac {-\operatorname {LambertW}\left (-x \,{\mathrm e}^{c_1 +\frac {1}{x}}\right ) x +c_1 x +1}{x}} \]

✓ Mathematica. Time used: 4.002 (sec). Leaf size: 26

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

\begin{align*} y(x)\to -W\left (x \left (-e^{\frac {1}{x}-c_1}\right )\right ) \\ y(x)\to 0 \\ \end{align*}

✓ Sympy. Time used: 0.467 (sec). Leaf size: 14

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

\[ y{\left (x \right )} = - W\left (C_{1} x e^{\frac {1}{x}}\right ) \]