System:
ẋ = μx − ωy − x(x²+y²)
ẏ = ωx + μy − y(x²+y²)
Regime: stable focus
μ < 0 → spiral sink
μ = 0 → bifurcation
μ > 0 → limit cycle
r* = √μ
ẋ = μx − ωy − x(x²+y²)
ẏ = ωx + μy − y(x²+y²)
Regime: stable focus
μ < 0 → spiral sink
μ = 0 → bifurcation
μ > 0 → limit cycle
r* = √μ