Algebraic Equations.
 
Integrals.
 
The Duffing Equation.
 
The Linear Damped Oscillator.
 
Self-Excited Oscillators.
 
Systems with Quadratic and Cubic Nonlinearities.
 
General Weakly Nonlinear Systems.
 
Forced Oscillations of the Duffing Equation.
 
Multifrequency Excitations.
 
The Mathieu Equation.
 
Boundary-Layer Problems.
 
Linear Equations with Variable Coefficients.
 
Differential Equations with a Large Parameter.
 
Solvability Conditions.
 
Appendices.
 
Bibliography.
 
Index.