## Glossary - O

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |

- one-sided limit
- one-sided limits and limits
- one-to-one
- onto
- open
- open cover
- open set, characterization
- open set, inverse image under continuous function
- open sets, intersections of
- open sets, unions of
- order of summation
- ordered pairs of integers
- ordered set
- ordering
- oscillation and essential discontinuities
- outer measure
- outer measure of intervals
- outer measure, properties