ABSTRACT
The International System of units (SI) was adopted by the 11th General Conference on Weights and Measures in 1960. It is a coherent system of units built from seven SI base units, one for each of the seven dimensionally independent base quantities: the meter, kilogram, second, ampere, kelvin, mole, and candela, for the dimensions length, mass, time, electric current, thermodynamic temperature, amount of substance, and luminous intensity, respectively. In the International System there is only one SI unit for each physical quantity. A permutation of positive integers is “even” or “odd” if the total number of inversions is an even integer or an odd integer.
