61.2.41 problem 41

Internal problem ID [11968]
Book : Handbook of exact solutions for ordinary differential equations. By Polyanin and Zaitsev. Second edition
Section : Chapter 1, section 1.2. Riccati Equation. 1.2.2. Equations Containing Power Functions
Problem number : 41
Date solved : Sunday, March 30, 2025 at 09:29:47 PM
CAS classification : [_rational, _Riccati]

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

✓ Maple. Time used: 0.006 (sec). Leaf size: 34

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

\[ y = \tan \left (\frac {x^{m +n}+\left (-m -n \right ) c_1}{m +n}\right ) x^{m -n} \]

✓ Mathematica. Time used: 0.488 (sec). Leaf size: 28

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

\[ y(x)\to x^{m-n} \tan \left (\frac {x^{m+n}}{m+n}+c_1\right ) \]

✗ Sympy

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

NotImplementedError : The given ODE Derivative(y(x), x) - (m*y(x) - n*y(x) + x**(2*m) + x**(2*n)*y(x)**2)/x cannot be solved by the factorable group method