Abstract
We compare and combine two approaches that have been recently introduced by Dafnis and Paouris [DP] and by Klartag and Milman [KM] with the aim of providing bounds for the isotropic constants of convex bodies. By defining a new hereditary parameter for all isotropic log-concave measures, we are able to show that the method in [KM], and the apparently stronger conclusions it leads to, can be extended in the full range of the 'weaker' assumptions of [DP]. The new parameter we define is related to the highest dimension k\leq n-1 in which one can always find marginals of an n-dimensional isotropic measure which have bounded isotropic constant.
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