The optimization of a randomness extractor can be best determined from the “min” variant of this variable as the smallest of the (15[1])Rényi family variants of this variable. (15[2])For a uniform probability (15[1])distribution (15[1])the Hartley function is equivalent to one definition of this variable. (15[2])A quantum type of this variable vanishes when the density matrix is that (15[1])of (10[1])a (15[1])pure state and is named for (*) Von Neumann. (10[10])The (10[1])molecular (10[2])chaos (10[1])assumption was used (10[1])to derive an integral equal to a function (10[1])of this variable, which following later convention was represented with an H. (10[1])Gibbs (10[1])created a definition (10[1])of this variable (10[1])based on a summation (10[1])of a function (10[1])of the probability of microstate (10[1])energies. (10[4])For 10 points, (10[1])name this (10[1])variable (10[1])equal to the Boltzmann constant times the natural log (10[2])of microstates. (10[1])■END■ (10[3])