---
tag: N1XSAXCQY3
kind: concept
name: Almost all
aliases: [frivolous-theorem-of-arithmetic]
sources:
  - wikipedia: en:1309@r1328127267
    locator: Almost all
    note: adopted
    mention: wikipedia://en/1309
    sections: [Summary]
same_as:
  wikidata: Q1397701
  wikipedia: Almost all
inventory: [AEKZWNRA55]
---

## Summary

In mathematics, the term "**almost all**" means "all but a negligible quantity". More precisely, if $X$ is a [[set|0BSJ7RQ9BW]], "almost all elements of $X$" means "all elements of $X$ but those in a negligible [[subset|0BJR9QR08E]] of $X$". The meaning of "negligible" depends on the mathematical context; for instance, it can mean [[finite|070R982G4B]], [[countable|01TQB88H4C]], or null.