Advent Wreath Candles. Set on the branches of the wreath are four candles: three purple candles and one pink candle. In the center of the wreath sits a white candle. As a whole, these candles represent the coming of the light of Christ into the world. On the first Sunday of Advent, the first purple candle is lit.
In mathematics,  a coefficient is a multiplicative factor in some term of a polynomial, a series or any expression; it is usually a number, but may be any expression. In the latter case, the variables appearing in the coefficients are often called parameters, and must be clearly distinguished from the other variables.
Definition: The Gini coefficient is a number between zero and one that is a measure of inequality. An example is the concentration of suppliers in a market or industry.efinition: The Gini coefficient is a number between zero and one that is a measure of inequality. An example is the concentration of suppliers in a market or industry.