An exact sequence is a sequence of algebraic objects and morphisms between them where the image of one morphism is exactly the kernel of the next. This concept is fundamental in many areas of mathematics, particularly in homology and cohomology theories, as it provides a way to understand relationships between different structures. In the context of cohomology groups, exact sequences help to capture important properties of spaces and their differential forms by relating them in a precise manner.
congrats on reading the definition of Exact Sequence. now let's actually learn it.