## Topology: a first course, Prentice-Hall, Inc

- Mu Munkres, James R
- Englewood Cliffs, N.J.,
- 1975

The proofs that these maps are continuous are simple estimates that you probably remember from calculus. Since the continuity of all the maps we’ll look at in these notes is proved by expressing them in terms of the maps a and m, we include the proofs of continuity of a and m for completeness. Proof. To prove that the addition map a is continuous, suppose x… (More)

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