I am doing a course in dynamical systems, and the term "time invariant" when it comes to systems is quite not clear.
I understand if time is not an explicit variable in the equation then it's a time invariant system, but again aren't all dynamical systems from time dependent?
I mean, a pendulum location and speed is dependent on its time, and yes the laws of physics governing it are the same regardless of the time, but this won't affect that it's still dependent on time in its motion
So what am I missing or have misunderstood? Thanks alot!