👉 In mathematics, "principial" refers to a specific number or a significant factor that is considered key or important. It can also refer to a principle or rule that guides or dictates how something should be done or thought about. For example: - In physics, the concept of "principial energy" relates to the amount of energy that a system has in its initial state before it undergoes any external forces. This is often referred to as the "principal energy level" of the system
