Quantitative versions are given of the equivalence of the Brunn-Minkowski i
nequality and Minkowski's first inequality from the Brunn-Minkowski theory.
Similar quantitative versions are obtained of the equivalence of the corre
sponding inequalities from Lutwak's dual Brunn-Minkowski theory. The main r
esults are shown to be the best possible up to constant factors. (C) 2000 A
cademic Press.