---
tag: ZC29HG87F0
kind: concept
name: Much-greater-or-less
sources:
  - wikipedia: en:73634@r1376316324
    locator: Glossary of mathematical symbols, section Comparison
    note: adopted
    mention: wikipedia://en/73634#DZN9
    sections: [Summary]
inventory: [W2RA2E1HH2]
---

## Summary

Means "much less than" and "much greater than". Generally, *much* is not formally defined, but means that the lesser quantity can be neglected with respect to the other. This is generally the case when the lesser quantity is smaller than the other by one or several orders of magnitude.

In measure theory, $\mu\ll\nu$ means that the measure $\mu$ is absolutely continuous with respect to the measure $\nu$.