What is amalie Emmy noether known for?

Answer 1

She was mainly known for Noether's Theorem, which is often quoted nowadays, when talking about conservation of energy. Noether's Theorem makes it possible to relate several conservation laws with corresponding laws of symmetry in the Universe. In the case of energy conservation, this is related to the fact that physical laws don't change over time. In other words, if energy conservation weren't valid, then physical laws would change over time! Similarly, the law of Conservation of Momentum is related to another symmetry: physical laws are the same anywhere in the Universe. Please note that a detailed understanding of Noether's Theorem requires some pretty advanced math.