%0 Journal Article
%T On the nonexistence of a relation between ¦Ò-left-porosity and ¦Ò-right-porosity
%A Martin Rmoutil
%J Mathematics
%D 2012
%I arXiv
%X Given an arbitrarily weak notion of left-<f>-porosity and an arbitrarily strong notion of right-<g>-porosity, we construct an example of closed subset of the real line which is not sigma-left-<f>-porous and is right-<g>-porous. We also briefly summarize the relations between three different definitions of porosity controlled by a function; we then observe that our construction gives the example for any combination of these definitions of left-porosity and right-porosity.
%U http://arxiv.org/abs/1205.1780v2