Packages 
Package Description
org.hipparchus.ode
This package provides classes to solve Ordinary Differential Equations problems.
org.hipparchus.ode.events
Events
org.hipparchus.ode.nonstiff
This package provides classes to solve non-stiff Ordinary Differential Equations problems.
org.hipparchus.ode.nonstiff.interpolators
This package provides classes implementing interpolators for dense outputs of ODE integrators.
org.hipparchus.ode.sampling
This package provides classes to handle sampling steps during Ordinary Differential Equations integration.