Geodesic
A $\sigma$-porous set need not be $\sigma$-bilaterally porous
Commentationes Mathematicae Universitatis Carolinae, Tome 35 (1994) no. 4, pp. 697-703.

Voir la notice de l'article provenant de la source Czech Digital Mathematics Library

A closed subset of the real line which is right porous but is not $\sigma$-left-porous is constructed.
Classification : 26A03, 26A21, 26A99, 28A05, 28A55, 54H05
Keywords: sigma-porous; sigma-bilaterally-porous; right porous 
@article{CMUC_1994__35_4_a10,
     author = {N\'ajares, J. and Zaj{\'\i}\v{c}ek, L.},
     title = {A $\sigma$-porous set need not be $\sigma$-bilaterally porous},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {697--703},
     publisher = {mathdoc},
     volume = {35},
     number = {4},
     year = {1994},
     mrnumber = {1321240},
     zbl = {0822.26001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1994__35_4_a10/}
}
TY  - JOUR
AU  - Nájares, J.
AU  - Zajíček, L.
TI  - A $\sigma$-porous set need not be $\sigma$-bilaterally porous
JO  - Commentationes Mathematicae Universitatis Carolinae
PY  - 1994
SP  - 697
EP  - 703
VL  - 35
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMUC_1994__35_4_a10/
LA  - en
ID  - CMUC_1994__35_4_a10
ER  - 
%0 Journal Article
%A Nájares, J.
%A Zajíček, L.
%T A $\sigma$-porous set need not be $\sigma$-bilaterally porous
%J Commentationes Mathematicae Universitatis Carolinae
%D 1994
%P 697-703
%V 35
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMUC_1994__35_4_a10/
%G en
%F CMUC_1994__35_4_a10
Nájares, J.; Zajíček, L. A $\sigma$-porous set need not be $\sigma$-bilaterally porous. Commentationes Mathematicae Universitatis Carolinae, Tome 35 (1994) no. 4, pp. 697-703. http://geodesic.mathdoc.fr/item/CMUC_1994__35_4_a10/