70XX 


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

70Fxx 

Dynamics of a system of particles, including celestial mechanics 


70F05 
Twobody problems 


70F07 
Threebody problems 


70F10 
$n$body problems 


70F15 
Celestial mechanics 


70F16 
Collisions in celestial mechanics, regularization 


70F17 
Inverse problems 


70F20 
Holonomic systems 


70F25 
Nonholonomic systems 


70F35 
Collision of rigid or pseudorigid bodies 


70F40 
Problems with friction 


70F45 
Infinite particle systems 


70F99 
None of the above, but in this section 