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 .
Then, epsilon can represent: An arbitrarily small, positive quantity commonly associated with the [math](\varepsilon, \delta)[/math] -definition of a limit. It is used in Hilbert's Epsilon Calculus, which is an extension of formal language by the epsilon operator. It can represent the Levi-Civita symbol. It can represent dual numbers.