common logarithm


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common logarithm

[¦käm·ən ′läg·ə‚rith·əm]
(mathematics)
The exponent in the representation of a number as a power of 10. Also known as Briggsian logarithm; Briggs' logarithm.
References in periodicals archive ?
The slope, m, in Equation 8 comes from a semilog graph with the common logarithm of equivalent time on the horizontal axis.
For the years 1987 to 1999 the highest predictability ranking issued was 1,580, but due to the elimination of extreme forecast error and earnings values our sample maximum is less; EARNINGS = annual earnings scaled by market value of common equity at the first fiscal quarter's forecast date; SIZE = common logarithm of the market value of equity, market value of equity = beginning of the year outstanding shares x Value Line reported price per share on the first fiscal quarter's forecast date; and TIMELY = Value Line timeliness ranking at the forecast date.
Thus, in Figure 11, natural logarithms are used instead of common logarithms, while a calculator that provides logarithms to bases other than 10, such as Casio fx-991ES PLUS, is used to demonstrate that the idea of halving the logarithm to find a square root (previously illustrated in Figure 6) is a feature of logarithms in general, not only of common logarithms: the numerical square root of 52 can be found with logarithms to any base.