37XX 


Dynamical systems and ergodic theory [See also 26A18, 28Dxx, 34Cxx, 34Dxx, 35Bxx, 46Lxx, 58Jxx, 70XX] 

37Jxx 

Finitedimensional Hamiltonian, Lagrangian, contact, and nonholonomic systems [See also 53Dxx, 70Fxx, 70Hxx] 


37J05 
General theory, relations with symplectic geometry and topology 


37J10 
Symplectic mappings, fixed points 


37J15 
Symmetries, invariants, invariant manifolds, momentum maps, reduction [See also 53D20] 


37J20 
Bifurcation problems 


37J25 
Stability problems 


37J30 
Obstructions to integrability (nonintegrability criteria) 


37J35 
Completely integrable systems, topological structure of phase space, integration methods 


37J40 
Perturbations, normal forms, small divisors, KAM theory, Arnolสนd diffusion 


37J45 
Periodic, homoclinic and heteroclinic orbits; variational methods, degreetheoretic methods 


37J50 
Actionminimizing orbits and measures 


37J55 
Contact systems [See also 53D10] 


37J60 
Nonholonomic dynamical systems [See also 70F25] 


37J99 
None of the above, but in this section 