> 70-XX Mechanics of particles and systems > 70GXX General models, approaches, and methods

70G10 Generalized coordinates; event, impulse-energy, configuration, state, or phase space	70G40 Topological and differential-topological methods	70G45 Differential-geometric methods (tensors, connections, symplectic, Poisson, contact, Riemannian, nonholonomic, etc.)
70G55 Algebraic geometry methods	70G60 Dynamical systems methods	70G65 Symmetries, Lie-group and Lie-algebra methods
70G70 Functional-analytic methods	70G75 Variational methods	70G99 None of the above, but in this section

70GXX General models, approaches, and methods