Epsilon

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The Jargon File Parts of this article are based on the Jargon File, v. 4.4.7, a public domain document of hacker jargon.

epsilon

Usage: n. adj. Derivation: See delta

epsilon: n. adj.

[see delta]

1. n. A small quantity of anything. "The cost is epsilon."
2. adj. Very small, negligible; less than marginal. "We can get this feature for epsilon cost."
3. within epsilon of: close enough to be indistinguishable for all practical purposes, even closer than being within delta of. "That's not what I asked for, but it's within epsilon of what I wanted." Alternatively, it may mean not close enough, but very little is required to get it there: "My program is within epsilon of working."

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