An Introduction to Algebraic Topology

For any topological space X and any point x_0 \in X, we aim to define a group \pi(X,x_0), the Fundamental Group of X, by a simple and intuitive manner by manipulation of closed paths in the space.  It will be proven that this group is the same for any choice of point x_0, and also that the group is an invariant of the topological space X—meaning, that any other space Y homeomorphic to X must have the same group.

This helps us construct a solid theory where (some) topological properties are turned into algebraic properties of the corresponding groups, hence establishing some sort of dictionary between different mathematical languages. This is the basic strategy of Algebraic Topology.

Algebraic Topology: An Introduction (Graduate Texts in Mathematics) (v. 56) (See all Topology Books)

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