The Morse Lemma is a fundamental result in Morse theory that provides a way to analyze the behavior of Morse functions near their critical points. It states that for any non-degenerate critical point of a Morse function, there exists a local coordinate system in which the function resembles a simple quadratic form, allowing one to classify the nature of the critical point. This lemma is key for understanding how critical points influence the topology of the underlying manifold and is essential when discussing Morse homology and the Morse-Witten complex.
congrats on reading the definition of Morse Lemma. now let's actually learn it.