## Glossary - U

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- uncountable
- uncountable set (example)
- uncountable, perfect sets
- uniform vs pointwise convergence
- uniform continuity
- uniform convergence
- uniform convergence and differentiability
- uniform convergence and integration
- uniform convergence and sup norm
- uniform convergence preserves continuity
- uniformly continuous and continuous
- union
- union of closed sets
- union of open sets
- upper bound
- upper sum
- upper sum as decreasing operator