QuadraticLifter

class QuadraticLifter

Quadratic lifting map \(q \to (q, q^2)\).

Methods:

lift	Apply the lifting map \(q \to (q, q^2)\).
lift_ddts	Get the time derivatives of the lifted variables, \(\frac{\partial}{\partial t}(q, q^2) = (q_t, 2qq_t)\).
unlift	Apply the reverse lifting map \((q, q^2) \to q\).
verify	Verify that lift() and unlift() are consistent and that lift_ddts(), if implemented, gives valid time derivatives.