I'm sorry for PDE and wrong section
In the polar coordinates have equations this shape:
rho' cos(phi)=rho sin(phi)(1+phi')
rho' sin(phi)=- rho cos(phi)(1+phi')
Homework Statement
Hi, i have the following system of equation. In the task is that system have periodic solution and have to be used polar coordinates.
Homework Equations
x'=1+y-x^2-y^2
y'=1-x-x^2-y^2
The Attempt at a Solution
After transfer to polar system i tried to use the method...