A $\sigma$-porous set need not be $\sigma$-bilaterally porous

Nájares, R. J., and Zajíček, Luděk. "A $\sigma $-porous set need not be $\sigma $-bilaterally porous." Commentationes Mathematicae Universitatis Carolinae 35.4 (1994): 697-703. <http://eudml.org/doc/247586>.

@article{Nájares1994,
abstract = {A closed subset of the real line which is right porous but is not $\sigma $-left-porous is constructed.},
author = {Nájares, R. J., Zajíček, Luděk},
journal = {Commentationes Mathematicae Universitatis Carolinae},
keywords = {sigma-porous; sigma-bilaterally-porous; right porous; right porosity; left porosity; sigma-bilaterally porous set; closed set},
language = {eng},
number = {4},
pages = {697-703},
publisher = {Charles University in Prague, Faculty of Mathematics and Physics},
title = {A $\sigma $-porous set need not be $\sigma $-bilaterally porous},
url = {http://eudml.org/doc/247586},
volume = {35},
year = {1994},
}

TY - JOUR
AU - Nájares, R. J.
AU - Zajíček, Luděk
TI - A $\sigma $-porous set need not be $\sigma $-bilaterally porous
JO - Commentationes Mathematicae Universitatis Carolinae
PY - 1994
PB - Charles University in Prague, Faculty of Mathematics and Physics
VL - 35
IS - 4
SP - 697
EP - 703
AB - A closed subset of the real line which is right porous but is not $\sigma $-left-porous is constructed.
LA - eng
KW - sigma-porous; sigma-bilaterally-porous; right porous; right porosity; left porosity; sigma-bilaterally porous set; closed set
UR - http://eudml.org/doc/247586
ER -