Census Bureau Reports 64 Percent Increase in Number of Children Living with a Grandparent Over Last Two Decades. In 2009, 7.8 million children lived with at least one grandparent, a 64 percent increase since 1991 when 4.7 million children lived with a grandparent, according to a new report from the U.S. Census Bureau.
Epsilon (uppercase Îµ, lowercase Îµ or lunate Ïµ; Greek: Î­ÏÎ¹Î»Î¿Î½) is the fifth letter of the Greek alphabet, corresponding phonetically to a mid front unrounded vowel /e/. In the system of Greek numerals it has the value five. It was derived from the Phoenician letter He .
Mark has 60+ answers in. Mathematics. Epsilon is just a Greek letter that's used by mathematicians when they've run out of Roman letters. Normally only the lower-case version, [math]\epsilon[/math], is used, because the upper-case version is not distinctive: E. Probably the most famous use is in the so-called epsilon-delta definition of a limit (see (Îµ, Î´)-definition of limit). Roughly, a function f(x) has the limit l as x approaches a if, for any small range delta, you can make f(x) be closer than delta to l by picking x within epsilon of a. So epsilon is sometimes used as a metaphor for a very small error range around a point.