[‚kȯl·mə′gȯ·rȯf ‚in·i′kwäl·əd·ēz] (mathematics) For each integer K let Xkbe a random variable with finite variance σkand suppose {Xk} is an independent sequence which is uniformly bounded by some constant c ; then for every ε>0, and integer n, and ESkdenotes the expected value of Sk.