Course Description
This is a course on the singular homology of topological spaces. Topics include: Singular homology, CW complexes, Homological algebra, Cohomology, and Poincare duality.
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![A collection of colorful circles arranged in such a way as they result in a three-sphere.](/courses/18-905-algebraic-topology-i-fall-2016/5e0c719d764c68917a8e422c4fd7c449_18-905f16.gif)
The Hopf fibration shows how the three-sphere can be built by a collection of circles arranged like points on a two-sphere. This is a frame from an animation of fibers in the Hopf fibration over various points on the two-sphere. (Image and animation courtesy of Niles Johnson.