The Theoretical Minimum: What You Need to Know to Start Doing Physics

by Leonard Susskind

deterministic.

reversible.

the collection of all states occupied by a system is its space of states, or, more simply, its state-space.

A world whose evolution is discrete could be called stroboscopic.

law of motion, or dynamical law.

The variables describing a system are called its degrees of freedom.

determined

the laws are deterministic into the past as well as the future.

There must be one arrow to tell you where you’re going and one to tell you where you came from.

the conservation of information.