70XX 


Mechanics of particles and systems {For relativistic mechanics, see 83A05 and 83C10; for statistical mechanics, see 82XX} 

70Kxx 

Nonlinear dynamics [See also 34Cxx, 37XX] 


70K05 
Phase plane analysis, limit cycles 


70K20 
Stability 


70K25 
Free motions 


70K28 
Parametric resonances 


70K30 
Nonlinear resonances 


70K40 
Forced motions 


70K42 
Equilibria and periodic trajectories 


70K43 
Quasiperiodic motions and invariant tori 


70K44 
Homoclinic and heteroclinic trajectories 


70K45 
Normal forms 


70K50 
Bifurcations and instability 


70K55 
Transition to stochasticity (chaotic behavior) [See also 37D45] 


70K60 
General perturbation schemes 


70K65 
Averaging of perturbations 


70K70 
Systems with slow and fast motions 


70K75 
Nonlinear modes 


70K99 
None of the above, but in this section 