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Homotopy theory, homological algebra, algebraic treatments of manifolds.

6 votes
1 answer
387 views

Homotopy groups of linearization of a space

If $X$ is a pointed space and $A$ is an abelian group, then we can form the space $A[X]$ whose points are finite formal sums $\sum a_i x_i$ with $a_i \in A, x_i \in X$ subject to some natural relation …