A Characterization of Sigma-symmetrically Porous Symmetrical Cantor Sets
Robin J. Evans, Paul D. Humke, Karen Saxe · Proceedings of the American Mathematical Society · 1994
The purpose of this paper is to characterize those symmetric Cantor sets which are <r-symmetrically porous in terms of a defining sequence of deleted proportions. In contrast to other notions of porosity, a symmetric Cantor set can be ^-symmetrically porous without being symmetrically porous.