epoch
= E =
epsilon squared
epsilon
[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."
--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.